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4l60e 65e 70e technical thread, cooler install codes, diagrams more!

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Old 05-14-2009, 01:59 AM
  #11  
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* P0453 - Fuel Tank Pressure Sensor Circuit High Voltage
* P0454 - Evaporative Emission Control System Pressure Sensor Intermittent
* P0455 - Evaporative Emission (EVAP) System Leak Detected
* P0460 - Fuel Level Sensor Circuit
* P0461 - Fuel Level Sensor Performance
* P0462 - Fuel Level Sensor Circuit Low Voltage
* P0463 - Fuel Level Sensor Circuit High Voltage
* P0464 - Fuel Level Sensor Circuit Intermittent
* P0465 - Purge Flow Sensor Circuit Malfunction
* P0466 - Purge Flow Sensor Circuit Range/Performance
* P0467 - Purge Flow Sensor Circuit Low Input
* P0468 - Purge Flow Sensor Circuit High Input
* P0469 - Purge Flow Sensor Circuit Intermittent
* P0470 - Exhaust Pressure Sensor Malfunction
* P0471 - Exhaust Pressure Sensor Range/Performance
* P0472 - Exhaust Pressure Sensor Low
* P0473 - Exhaust Pressure Sensor High
* P0474 - Exhaust Pressure Sensor Intermittent
* P0475 - Exhaust Pressure Control Valve Malfunction
* P0476 - Exhaust Pressure Control Valve Range/Performance
* P0477 - Exhaust Pressure Control Valve Low
* P0478 - Exhaust Pressure Control Valve High
* P0479 - Exhaust Pressure Control Valve Intermittent
* P0480 - Cooling Fan Relay 1 Control Circuit
* P0481 - Cooling Fan Relay 2 Control Circuit
* P0482 - Cooling Fan 3 Control Circuit Malfunction
* P0483 - Cooling Fan Rationality Check Malfunction
* P0484 - Cooling Fan Circuit Over Current
* P0485 - Cooling Fan Power/Ground Circuit Malfunction
* P0496 - Evaporative Emission (EVAP) System Flow During Non-Purge
* P0500 - Vehicle Speed Sensor (VSS) Circuit
* P0501 - Vehicle Speed Sensor Range/Performance
* P0502 - Vehicle Speed Sensor (VSS) Circuit Low Input
* P0503 - Vehicle Speed Sensor (VSS) Circuit Intermittent
* P0505 - Idle Control System Malfunction
* P0506 - Idle Speed Low
* P0507 - Idle Speed High
* P0510 - Closed Throttle Position Switch Malfunction
* P0512 - Start Switch Circuit
* P0520 - Engine Oil Pressure Sensor/Switch Circuit Malfunction
* P0521 - Engine Oil Pressure Sensor/Switch Circuit Range/Performance
* P0522 - Engine Oil Pressure Sensor/Switch Circuit Low Voltage
* P0523 - Engine Oil Pressure Sensor/Switch Circuit High Voltage
* P0526 - Cooling Fan Speed Sensor Circuit
* P0530 - A/C Refrigerant Pressure Sensor Circuit Malfunction
* P0531 - A/C Refrigerant Pressure Sensor Circuit Range/Performance
* P0532 - Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage
* P0533 - Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage
* P0534 - Air Conditioner Refrigerant Charge Loss
* P0550 - Power Steering Pressure (PSP) Switch Circuit
* P0551 - Power Steering Pressure Sensor Circuit Range/Performance
* P0552 - Power Steering Pressure Sensor Circuit Low Input
* P0553 - Power Steering Pressure Sensor Circuit High Input
* P0554 - Power Steering Pressure Sensor Circuit Intermittent
* P0560 - System Voltage
* P0561 - System Voltage Unstable
* P0562 - System Voltage Low (TCM)
* P0563 - System Voltage High (TCM)
* P0564 - Cruise Control Multi-Function Switch Circuit (PCM)
* P0565 - Cruise Control On Signal Malfunction
* P0566 - Cruise Control Off Signal Malfunction
* P0567 - Cruise Control Resume Signal Malfunction
* P0568 - Cruise Control Set Signal Malfunction
* P0569 - Cruise Control Coast Signal Malfunction
* P0570 - Cruise Control Accel Signal Malfunction
* P0571 - Cruise Control Brake Switch Circuit
* P0573 - Cruise Control/Brake Switch A Circuit High
* P0574 - Vehicle Speed Too High - above 110 mph - Cruise Control Disabled
* P0575 - Cruise Control Related Malfunction
* P0576 - Cruise Control Related Malfunction
* P0576 - Cruise Control Related Malfunction
* P0578 - Cruise Control Related Malfunction
* P0579 - Cruise Control Related Malfunction
* P0580 - Cruise Control Related Malfunction
* P0600 - Serial Communication Link Malfunction
Old 05-14-2009, 02:00 AM
  #12  
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* P0601 - Control Module Read Only Memory (ROM)
* P0602 - Control Module Not Programmed
* P0603 - Control Module Long Term Memory Reset
* P0604 - Control Module Random Access Memory (RAM)
* P0605 - Control Module Programming Read Only Memory (ROM)
* P0606 - Control Module Internal Performance
* P0607 - ECU Malfunction
* P0608 - Control Module VSS Output "A" Malfunction
* P0609 - Control Module VSS Output "B" Malfunction
* P0610 - Control Module Vehicle Options Incorrect
* P0615 - Starter Relay Control Circuit
* P0616 - Starter Relay Control Circuit Low Voltage
* P0617 - Starter Relay Control Circuit High Voltage
* P0620 - Generator Control Circuit Malfunction
* P0621 - Generator L-Terminal Circuit
* P0622 - Generator F-Terminal Circuit
* P0625 - Generator F-Terminal Circuit Low Voltage
* P0626 - Generator F-Terminal Circuit High Voltage
* P0628 - Fuel Pump Relay Control Circuit Low Voltage
* P0629 - Fuel Pump Relay Control Circuit High Voltage
* P0638 - Throttle Actuator Control (TAC) Command Performance
* P0641 - PCM voltage out of tolerance condition on the 5-volt reference circuit
* P0645 - Air Conditioning (A/C) Clutch Relay Control Circuit
* P0646 - Air Conditioning (A/C) Clutch Relay Control Circuit
* P0647 - Air Conditioning (A/C) Clutch Relay Control Circuit
* P0650 - Malfunction Indicator Lamp (MIL) Control Circuit
* P0651 - PCM voltage out of tolerance condition on the 5-volt reference circuit
* P0654 - Engine RPM Output Circuit Malfunction
* P0655 - Engine Hot Lamp Output Control Circuit Malfucntion
* P0656 - Fuel Level Output Circuit Malfunction
* P0660 - Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit
* P0661 - Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit Low Voltage
* P0662 - Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit High Voltage
* P0685 - Engine Controls Ignition Relay Control Circuit (PCM)
* P0691 - Cooling Fan Relay Control Circuit Low Voltage
* P0693 - Cooling Fan Relay Control Circuit Low Voltage
* P0692 - Cooling Fan Relay Control Circuit High Voltage
* P0694 - Cooling Fan Relay Control Circuit High Voltage
* P0700 - Transmission Control System Malfunction
* P0701 - Transmission Control System Range/Performance
* P0702 - Transmission Control System Electrical
* P0703 - Brake Switch Circuit Malfunction
* P0704 - Clutch Switch Input Circuit Malfunction
* P0705 - Trans Range Switch Circuit
* P0706 - Trans Range Switch Performance
* P0707 - Transmission Range Sensor Circuit Low Input
* P0708 - Transmission Range Sensor Circuit High Input
* P0709 - Transmission Range Sensor Circuit Intermittent
* P0710 - Transmission Fluid Temperature Sensor Circuit Malfunction
* P0711 - TFT Sensor Circuit Range/Performance
* P0712 - Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
* P0713 - Transmission Fluid Temperature (TFT) Sensor Circuit High Input
* P0714 - Transmission Fluid Temperature Sensor Circuit Intermittent
* P0715 - Input/Turbine Speed Sensor Circuit Malfunction
* P0716 - Input Speed Sensor Circuit Intermittent
* P0717 - Input Speed Sensor Circuit Low Input
* P0718 - Input/Turbine Speed Sensor Circuit Intermittent
* P0719 - Brake Switch Circuit Low Input
* P0720 - Output Speed Sensor Circuit Malfunction
* P0721 - Output Speed Sensor Range/Performance
* P0722 - Output Speed Sensor Circuit Low Input
* P0723 - Output Speed Sensor Intermittent
* P0724 - Brake Switch Circuit High Input
* P0725 - Engine Speed Input Circuit
* P0726 - Engine Speed Input Circuit Range/Performance
* P0727 - Engine Speed Circuit No Signal
* P0728 - Engine Speed Input Circuit Intermittent
* P0730 - Incorrect Gear Ratio
* P0731 - Incorrect 1st Gear Ratio
* P0732 - Incorrect 2nd Gear Ratio
* P0733 - Incorrect 3rd Gear Ratio
* P0734 - Incorrect 4th Gear Ratio
* P0735 - Gear 5 Incorrect ratio
* P0736 - Reverse incorrect gear ratio
* P0740 - TCC Enable Solenoid Circuit Electrical
* P0741 - TCC System Stuck Off
* P0742 - TCC System Stuck On
* P0743 - TCC Enable Solenoid Circuit Electrical
* P0744 - Torque Converter Clutch Circuit Intermittent
* P0745 - Pressure Control Solenoid Malfunction
* P0746 - Pressure Control Solenoid Performance or Stuck Off
* P0747 - Pressure Control Solenoid Stuck On
* P0748 - Pressure Control Solenoid Circuit Electrical
* P0749 - Pressure Control Solenoid Intermittent
* P0750 - Shift Solenoid A Malfunction
* P0751 - 1-2 Shift Solenoid Valve Performance - No First or Fourth Gear
* P0752 - 1-2 Shift Solenoid Valve Performance - No Second or Third Gear
* P0753 - 1-2 Shift Solenoid Circuit Electrical
* P0754 - Shift Solenoid A Intermittent
* P0755 - Shift Solenoid B Malfunction
* P0756 - 2-3 Shift Solenoid Valve Performance - No First or Second Gear
* P0757 - 2-3 Shift Solenoid Valve Performance - No Third or Fourth Gear
* P0758 - 2-3 Shift Solenoid Circuit Electrical
* P0759 - Shift Solenoid B Intermittent
* P0760 - Shift Solenoid C Malfunction
* P0761 - Shift Solenoid C Performance or Stuck Off
* P0762 - Shift Solenoid C Stuck On
* P0763 - Shift Solenoid C Electrical
* P0764 - Shift Solenoid C Intermittent
* P0765 - Shift Solenoid D Malfunction
* P0766 - Shift Solenoid D Performance or Stuck Off
* P0767 - Shift Solenoid D Stuck On
* P0768 - Shift Solenoid D Electrical
* P0769 - Shift Solenoid D Intermittent
* P0770 - Shift Solenoid E Malfunction
* P0771 - Shift Solenoid E Performance or Stuck Off
* P0772 - Shift Solenoid E Stuck On
* P0773 - Shift Solenoid E Electrical
* P0774 - Shift Solenoid E Intermittent
* P0780 - Shift Malfunction
* P0781 - 1-2 Shift Malfunction
* P0782 - 2-3 Shift Malfunction
* P0783 - 3-4 Shift Malfunction
* P0784 - 4-5 Shift Malfunction
* P0785 - 3-2 Shift Solenoid Circuit Electrical
* P0786 - Shift/Timing Solenoid Range/Performance
* P0787 - Shift/Timing Solenoid Low
* P0788 - Shift/Timing Solenoid High
* P0789 - Shift/Timing Solenoid Intermittent
* P0790 - Normal/Performance Switch Circuit Malfunction
Old 05-14-2009, 02:00 AM
  #13  
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* P0801 - Reverse Inhibit Control Circuit Malfunction
* P0803 - 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction
* P0804 - 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction
* P0850 - Park/Neutral Position (PNP) Switch Circuit
* P0856 - Powertrain Indicated Traction Control Malfunction
* P0894 - Transmission Component Slipping
* P0897 - PCM detects a calculated transmission fluid life of 10 percent or less
* P0962 - Line Pressure Control (PC) Solenoid Control Circuit Low Voltage (TCM)
* P0963 - Line Pressure Control (PC) Solenoid Control Circuit High Voltage (TCM)
* P0966 - Clutch Pressure Control (PC) Solenoid Control Circuit Low Voltage (TCM)
* P0967 - Clutch Pressure Control (PC) Solenoid Control Circuit High Voltage (TCM)
* P0970 - Shift Pressure control (PC) Solenoid Control Circuit Low Voltage (TCM)
* P0971 - Shift Pressure Control (PC) Solenoid Control High Voltage (TCM)
* P0973 - PCM detects an open or short to ground in the 1-2 SS valve circuit
* P0974 - PCM detects a continuous short to voltage in the 1-2 SS valve circuit
* P0976 - PCM detects a continuous open or short to ground in the 2-3 SS valve circuit
* P0977 - PCM detects a continuous short to voltage in the 2-3 SS valve circuit
* P0979 - Shift Solenoid (SS) 3 Control Circuit Low Voltage (TCM)
* P0980 - Shift Solenoid (SS) 3 Control Circuit High Voltage (TCM)
* P0982 - Shift Solenoid (SS) 4 Control Circuit High Voltage (TCM)
* P0983 - Shift Solenoid (SS) 4 Control Circuit High Voltage (TCM)
* P0985 - Shift Solenoid (SS) 5 Control Circuit Low Voltage (TCM)
* P0986 - Shift Solenoid (SS) 5 Control Circuit High Voltage (TCM)
* P1031 - Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1
* P1032 - Heated Oxygen Sensor (HO2S) Heater Warm Up Control Circuit Banks 1 and 2 Sensor 1
* P1101 - Actual measured airflow from MAF, MAP, EGR, and TP is not within range of the calculated airflow
* P1105 - Secondary Vacuum Sensor Circuit
* P1106 - Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
* P1107 - Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
* P1108 - BARO to MAP Sensor Comparison Too High
* P1109 - Secondary Port Throttle System
* P1111 - Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
* P1112 - Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
* P1113 - Intake Resonance Switchover Solenoid Control Circuit
* P1114 - Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage
* P1115 - Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage
* P1116 - ECT Signal Unstable or Intermittent
* P1117 - Engine Coolant Temp. Signal Out-Of-Range Low
* P1118 - Engine Coolant Temp. Signal Out-Of-Range High
* P1119 - ECT Signal Out-Of-Range With TFT Sensor
* P1120 - Throttle Position (TP) Sensor 1 Circuit
* P1121 - Throttle Position (TP) Sensor Circuit Intermittent High Voltage
* P1122 - Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
* P1125 - Accelerator Pedal Position (APP) System
* P1130 - Heated Oxygen Sensor (HO2S) Circuit Low Variance Bank 1 Sensor 1
* P1131 - Heated Oxygen Sensor (HO2S) Circuit Low Variance Bank 1 Sensor 2
* P1132 - Heated Oxygen Sensor (HO2S) Circuit Low Variance Bank 2 Sensor 1
* P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
* P1134 - Heated Oxygen Sensor (HO2S) Transition Time Ratio Bank 1 Sensor 1
* P1135 - Heated Oxygen Sensor (HO2S) Lean Mean Bank 1 Sensor 1
* P1136 - Heated Oxygen Sensor (HO2S) Rich Mean Bank 1 Sensor 1
* P1137 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Lean System or Low Voltage
* P1138 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Rich or High Voltage
* P1139 - Heated Oxygen Sensor (HO2S) Insuff. Switching Bank 1 Sensor 2
* P1140 - Heated Oxygen Sensor (HO2S) Transition Time Ratio Bank 1 Sensor 2
* P1141 - Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2
* P1143 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 3 Lean System or Low Voltage
* P1144 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 3 Rich or High Voltage
* P1145 - Heated Oxygen Sensor (HO2S) Cross Counts Bank 1 Sensor 3
* P1153 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 2 Sensor 1
* P1154 - Heated Oxygen Sensor (HO2S) Transition Time Ratio Bank 2 Sensor 1
* P1155 - Heated Oxygen Sensor (HO2S) Lean Mean Bank 2 Sensor 1
* P1156 - Heated Oxygen Sensor (HO2S) Rich Mean Bank 2 Sensor 1
* P1157 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Lean System or Low Voltage
* P1158 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Rich or High Voltage
* P1159 - Heated Oxygen Sensor (HO2S) Cross Counts Bank 2 Sensor 2
* P1161 - Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 2 Sensor 2
* P1163 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 3 Lean System or Low Voltage
* P1164 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 3 Rich or High Voltage
* P1165 - Heated Oxygen Sensor (HO2S) Cross Counts Bank 2 Sensor 3
* P1170 - Bank to Bank Fuel Trim Offset
* P1171 - Fuel System Lean During Acceleration
* P1172 - Fuel Transfer Pump Flow Insufficient
* P1185 - Engine Oil Temperature Circuit
* P1186 - EOT Circuit Performance
* P1187 - EOT Sensor Circuit Low Voltage
* P1188 - EOT Sensor Circuit High Voltage
* P1189 - Engine Oil Pressure (EOP) Switch Circuit
* P1190 - Engine Vacuum Leak
* P1191 - Intake Air Duct Air Leak
* P1200 - Injector Control Circuit
* P1201 - (Alt. Fuel) Gas Mass Sensor Circuit Range/Performance
* P1202 - (Alt. Fuel) Gas Mass Sensor Circuit Low Frequency
* P1203 - (Alt. Fuel) Gas Mass Sensor Circuit High Frequency
* P1211 - Mass Air Flow Circuit Intermittent High
* P1212 - Mass Air Flow Circuit Intermittent Low
* P1214 - Injection Pump Timing Offset
* P1215 - Ground Fault Detection Indicated
* P1216 - Fuel Solenoid Response Time Too Short
* P1217 - Fuel Solenoid Response Time Too Long
* P1218 - Injection Pump Calibration Circuit
* P1219 - Throttle Position Sensor Reference Voltage
* P1220 - Throttle Position (TP) Sensor 2 Circuit
* P1221 - Fuel Pump Secondary Circuit Low
* P1222 - Injector Control Circuit Intermittent
* P1225 - Injector Circuit Cylinder 2 Intermittent
* P1228 - Injector Circuit Cylinder 3 Intermittent
* P1231 - Injector Circuit Cylinder 4 Intermittent
* P1234 - Injector Circuit Cylinder 5 Intermittent
* P1237 - Injector Circuit Cylinder 6 Intermittent
* P1240 - Injector Circuit Cylinder 7 Intermittent
* P1243 - Injector Circuit Cylinder 8 Intermittent
* P1245 - Intake Plenum Switchover Valve
* P1250 - Early Fuel Evaporation Heater Circuit
* P1257 - Supercharger System Overboost
* P1258 - Engine Coolant Overtemperature - above 268°F - Protection Mode Active
* P1260 - Last Test Failed Failed SCC ENTER:More Info.
* P1270 - Accelerator Pedal Position Sensor A/D Converter Error
* P1271 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation
* P1272 - Accelerator Pedal Position Sensor 2
* P1273 - "Accelerator Pedal Position Sensor 1
* P1274 - Injectors Wired Incorrectly
* P1275 - Accelerator Pedal Position (APP) Sensor 1 Circuit
* P1276 - Accelerator Pedal Position Sensor 1 Circuit Performance
* P1277 - Accelerator Pedal Position Sensor 1 Circuit Low Voltage
* P1278 - Accelerator Pedal Position Sensor 1 Circuit High Voltage
* P1280 - Accelerator Pedal Position (APP) Sensor 2 Circuit
* P1281 - Accelerator Pedal Position Sensor 2 Circuit Performance
* P1282 - Accelerator Pedal Position Sensor 2 Circuit Low Voltage
* P1283 - Accelerator Pedal Position Sensor 2 Circuit High Voltage
Old 05-14-2009, 02:03 AM
  #14  
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* P1285 - Accelerator Pedal Position Sensor 3 Circuit
* P1286 - Accelerator Pedal Position Sensor 3 Circuit Performance
* P1287 - Accelerator Pedal Position Sensor 3 Circuit Low Voltage
* P1288 - Accelerator Pedal Position Sensor 3 Circuit High Voltage
* P1300 - Ignitor Circuit
* P1305 - Ignition Coil 2 Primary Feedback Circuit
* P1310 - Ignition Coil 3 Primary Feedback Circuit
* P1315 - Ignition Coil 4 Primary Feedback Circuit
* P1320 - IC 4X Reference Circuit Intermittent
* P1321 - Electronic Ignition System Fault Line
* P1322 - EI System or Ignition Control Extra or Missing
* P1323 - IC 24X Reference Circuit Low Frequency
* P1324 - Crank RPM Too Low
* P1335 - CKP Circuit
* P1336 - Crankshaft Position (CKP) System Variation Not Learned
* P1345 - Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation
* P1346 - Intake Camshaft Position [CMP] Sensor System Performance
* P1350 - Ignition Control System
* P1351 - Ignition Coil Control Circuit High Voltage
* P1352 - IC Output High/Pulse Detected when GND_Cyl. 2
* P1353 - IC Output High/Pulse Detected when GND_Cyl. 3
* P1354 - IC Output High/Pulse Detected when GND_Cyl. 4
* P1355 - IC Output High/Pulse Detected when GND_Cyl. 5
* P1356 - IC Output High/Pulse Detected when GND_Cyl. 6
* P1357 - IC Output High/Pulse Detected when GND_Cyl. 7
* P1358 - IC Output High/Pulse Detected when GND_Cyl. 8
* P1359 - Ignition Coil Group 1 Control Circuit
* P1360 - Ignition Coil Group 2 Control Circuit
* P1361 - Ignition Coil Control Circuit Low Voltage
* P1362 - IC Cylinder 2 Not Toggling After Enable
* P1363 - IC Cylinder 3 Not Toggling After Enable
* P1364 - IC Cylinder 4 Not Toggling After Enable
* P1365 - IC Cylinder 5 Not Toggling After Enable
* P1366 - IC Cylinder 6 Not Toggling After Enable
* P1367 - IC Cylinder 7 Not Toggling After Enable
* P1368 - IC Cylinder 8 Not Toggling After Enable
* P1370 - IC 4X Reference Circuit Too Many Pulses
* P1371 - IC 4X Reference Circuit Too Few Pulses
* P1372 - Crankshaft Position (CKP) Sensor A-B Correlation
* P1374 - 3X Reference Circuit
* P1375 - IC 24X Reference Circuit High Voltage
* P1376 - Ignition Ground Circuit
* P1377 - IC Cam Pulse To 4X Reference Pulse
* P1380 - Misfire Detected - Rough Road Data Not Available
* P1381 - Misfire Detected - No Communication with Brake Control Module
* P1390 - Wheel Speed Sensor 1 - G - Sensor Circuit
* P1391 - Wheel Speed Sensor 1 - G - Sensor Circuit Performance
* P1392 - Wheel Speed Sensor 1 - G - Sensor Circuit Low Voltage
* P1393 - Wheel Speed Sensor 1 - G - Sensor Circuit High Voltage
* P1394 - Wheel Speed Sensor 1 - G - Sensor Circuit Intermittent
* P1395 - Wheel Speed Sensor 2 - G - Sensor Circuit
* P1396 - Wheel Speed Sensor 2 - G - Sensor Circuit Performance
* P1397 - Wheel Speed Sensor 2 - G - Sensor Circuit Low Voltage
* P1398 - Wheel Speed Sensor 2 - G - Sensor Circuit High Voltage
* P1399 - Wheel Speed Sensor 2 - G - Sensor Circuit Intermittent
* P1403 - Exhaust Gas Recirculation System Valve 1
* P1404 - Exhaust Gas Recirculation (EGR) Closed Position Performance
* P1405 - Exhaust Gas Recirculation System Valve 3
* P1406 - EGR Valve Pintle Position Circuit
* P1407 - EGR Air Intrusion in Exhaust Supply to EGR Valve
* P1408 - Intake Manifold Pressure Sensor Circuit
* P1409 - EGR Vacuum System Leak
* P1410 - Fuel Tank Pressure System
* P1415 - Secondary Air Injection (AIR) System Bank 1
* P1416 - Secondary Air Injection (AIR) System Bank 2
* P1418 - Secondary Air Injection System Relay A Control Circuit High
* P1420 - Intake Air Low Pressure Switch Circuit Low Voltage
* P1421 - Intake Air Low Pressure Switch Circuit High Voltage
* P1423 - Intake Air High Pressure Switch Circuit High Voltage
* P1431 - Fuel Level Sensor 2 Circuit Performance
* P1432 - Fuel Level Sensor 2 Circuit Low Voltage
* P1433 - Fuel Level Sensor 2 Circuit High Voltage
* P1441 - Evaporative Emission (EVAP) System Flow During Non-Purge
* P1442 - EVAP Vacuum Sw. High Voltage During Ign. On
* P1450 - Barometric Pressure Sensor Circuit
* P1451 - Barometric Press. Sensor Performance
* P1460 - Cooling Fan Control System
* P1480 - Cooling Fan 1 Control Circuit High
* P1481 - Cooling Fan Speed Sensor Circuit
* P1482 - Cooling Fan Speed Output Circuit
* P1483 - Engine Cooling System Performance
* P1484 - Cooling Fan System Performance
* P1500 - Starter Signal Circuit
* P1501 - Theft Deterrent System
* P1501 - Vehicle Speed Sensor Circuit Intermittent
* P1502 - Theft Deterrent Fuel Enable Signal Not Received
* P1503 - Theft Deterrent Fuel Enable Signal Not Correct
* P1504 - Vehicle Speed Output Circuit
* P1508 - Idle Speed Low - Idle Air Control (IAC) System Not Responding
* P1509 - Idle Speed High - Idle Air Control (IAC) System Not Responding
* P1510 - Throttle Control System Performance - Throttle Limitation Active
* P1511 - Throttle Control System - Backup System Performance
* P1514 - Airflow to TP Sensor Correlation High
* P1515 - Electronic Throttle System Throttle Position
* P1516 - Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
* P1517 - Electronic Throttle Module
* P1518 - Electronic Throttle Module to PCM Communication
* P1519 - Throttle Actuator Control (TAC) Module Internal Circuit
* P1520 - Transmission Range Switch Circuit
* P1521 - Transmission Engaged at High Throttle Angle
* P1522 - Park/Neutral to Drive/Reverse at High RPM
* P1523 - Throttle Closed Position Performance
* P1524 - Throttle Closed Position Performance
* P1525 - Throttle Body ServiceRequired
* P1526 - Minimum Throttle Position Not Learned
* P1527 - Transmission Range to Pressure Switch Correlation
* P1528 - Governor
* P1529 - Heated Windshield Request Problem
* P1530 - Throttle Actuator Control (TAC) Module Internal Circuit
* P1531 - A/C Low Side Temperature Sensor Fault
* P1532 - A/C Evaporator Temp. Sens. Circuit Low Voltage
* P1533 - A/C Evaporator Temp. Sens. Circuit High Voltage
* P1534 - A/C High Side Temp. Sensor Low Voltage
* P1535 - A/C High Side Temperature Sensor Circuit
* P1536 - Engine Coolant Overtemperature - Air Conditioning (A/C) Disabled
* P1537 - A/C Request Circuit Low Voltage
* P1538 - A/C Request Circuit High Voltage
* P1539 - A/C Clutch Status Circuit High Voltage
* P1540 - Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) Disabled
* P1541 - A/C High Side Over Temperature
* P1542 - A/C System High Pressure High Temperature
* P1543 - A/C System Performance
* P1544 - A/C Refrigerant Condition Very Low
* P1545 - Air Conditioning (A/C) Clutch Relay Control Circuit
* P1546 - A/C Clutch Status Circuit Low Voltage
* P1547 - A/C System Performance Degraded
* P1548 - A/C Recirculation Circuit
* P1551 - Throttle Valve Rest Position Not Reached During Learn
* P1554 - Cruise Control Feedback Circuit
* P1555 - Electronic Variable Orifice Output
* P1558 - Cruise Control Servo Indicates Low
* P1559 - Cruise Control Power Management Mode
* P1560 - Transaxle Not in Drive - Cruise Control Disabled
* P1561 - Cruise Vent Solenoid
* P1562 - Cruise Vacuum Solenoid
* P1563 - Cruise Vehicle Speed/Set Speed Difference Too High
* P1564 - Vehicle Acceleration Too High - Cruise Control Disabled
* P1565 - Cruise Servo Position Sensor
* P1566 - Engine RPM Too High - Cruise Control Disabled
* P1567 - Active Banking Control Active - Cruise Control Disabled
* P1568 - Cruise Servo Stroke Greater than Commanded in Cruise
* P1569 - Cruise Servo Stroke High While not in Cruise
* P1570 - Traction Control Active - Cruise Control Disabled
* P1571 - Traction Control Torque Request Circuit
* P1572 - ASR Active Circuit Low Too Long
* P1573 - PCM/EBTCM Serial Data Circuit
* P1574 - Stoplamp Switch Circuit
* P1575 - Extended Travel Brake Switch Circuit
* P1576 - BBV Sensor Circuit High Voltage
* P1577 - BBV Sensor Circuit Low Voltage
* P1578 - BBV Sensor Circuit Low Vacuum
* P1579 - P/N to D/R at High Throttle Angle - Power Reduction Mode Active
* P1580 - Cruise Move Circuit Low Voltage
* P1581 - Cruise Move Circuit High Voltage
* P1582 - Cruise Direction Circuit Low Voltage
* P1583 - Cruise Direction CircuitHigh Voltage
* P1584 - Cruise Control Disabled
* P1585 - Cruise Control Inhibit Output Circuit
* P1586 - Cruise Control Brake Switch 2 Circuit
* P1587 - Cruise Control Clutch Control Circuit Low
* P1588 - Cruise Control Clutch Control Circuit High
* P1599 - Engine Stall or Near Stall Detected
* P1600 - TCM Internal Watchdog Operation
* P1601 - Serial Comm. Problem With Device 1
* P1602 - Knock Sensor (KS) Module Performance
* P1603 - Loss of SDM Serial Data
* P1604 - Loss of IPC Serial Data
* P1605 - Loss of HVAC Serial Data
* P1606 - Serial Communication Problem With Device 6
* P1607 - Serial Communication Problem With Device 7
* P1608 - Serial Communication Problem With Device 8
* P1609 - Loss Of TCS Serial Data
* P1610 - Loss of PZM Serial Data
* P1611 - Loss of CVRTD Serial Data
* P1612 - Loss of IPM Serial Data
* P1613 - Loss of DIM Serial Data
* P1614 - Loss of RIM Serial Data
* P1615 - Loss of VTD Serial Data
* P1617 - Engine Oil Level Switch Circuit
* P1619 - Engine Oil Life Monitor Reset Circuit
* P1620 - Low Coolant Circuit
* P1621 - Control Module Long Term Memory Performance
* P1622 - Cylinder Select
Old 05-14-2009, 02:03 AM
  #15  
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* P1623 - Transmission Temp Pull-Up Resistor
* P1624 - Customer Snapshot Requested - Data Available
* P1625 - TCM System Reset
* P1626 - Theft Deterrent Fuel Enable Signal Not Received
* P1627 - A/D Performance
* P1628 - ECT Pull-Up Resistor
* P1629 - Theft Deterrent System - Cranking Signal
* P1630 - Theft Deterrent Learn Mode Active
* P1631 - Theft Deterrent Start Enable Signal Not Correct
* P1632 - Theft Deterrent Fuel Disable Signal Received
* P1633 - Ignition 0 Switch Circuit
* P1634 - Ignition 1 Switch Circuit
* P1635 - 5 Volt Reference Circuit
* P1636 - PCM Stack Overrun
* P1637 - Generator L-Terminal Circuit
* P1638 - Generator F-Terminal Circuit
* P1639 - 5 Volt Reference 2 Circuit
* P1640 - Driver-1-Input High Voltage
* P1641 - Malfunction Indicator Lamp (MIL) Control Circuit
* P1642 - Vehicle Speed Output Circuit
* P1643 - Engine Speed Output Circuit
* P1644 - Traction Control Delivered Torque Output Circuit
* P1645 - Evaporative Emission (EVAP) Vent Solenoid Contorl Circuit
* P1646 - Evaporative Emission (EVAP) Vent Solenoid Control Circuit
* P1647 - Driver 1 Line 7
* P1650 - Control Module Output B Circuit
* P1651 - Fan 1 Relay Control Circuit
* P1652 - Powertrain Induced Chassis Pitch Output Circuit
* P1653 - Oil Level Lamp Control Circuit
* P1654 - Cruise Control Inhibit Output Circuit
* P1655 - EVAP Purge Solenoid Control Circuit
* P1656 - Driver 2 Line 6
* P1657 - 1-4 Upshift Solenoid Control Circuit
* P1658 - Starter Enable Relay Control Circuit
* P1660 - Cooling Fan Control Circuits
* P1661 - MIL Control Circuit
* P1662 - Cruise Lamp Control Circuit
* P1663 - Oil Life Lamp Control Circuit
* P1664 - 1-4 Upshift Lamp Control Circuit
* P1665 - Driver 3 Line 5
* P1666 - Driver 3 Line 6
* P1667 - Reverse Inhibit Solenoid Control Circuit
* P1669 - ABS Unit Expected
* P1670 - Driver 4
* P1671 - Driver 4 Line 1
* P1672 - Low Engine Oil Level Lamp Control Circuit
* P1673 - Engine Hot Lamp Control Circuit
* P1674 - Tachometer Control Circuit
* P1675 - EVAP Vent Solenoid Control Circuit
* P1676 - Driver 4 Line 6
* P1677 - Driver 4 Line 7
* P1680 - Driver 5 (ECU Malfunction)
* P1681 - Driver 5 Line 1
* P1682 - Driver 5 Line 2
* P1683 - Driver 5 Line 3
* P1684 - Driver 5 Line 4
* P1685 - Driver 5 Line 5
* P1686 - Driver 5 Line 6
* P1687 - Driver 5 Line 7
* P1689 - Delivered Torque Circuit Fault
* P1690 - ECM Loop Overrun
* P1691 - Coolant Gage Circuit Low Voltage
* P1692 - Coolant Gage Circuit High Voltage
* P1693 - Tachometer Circuit Low Voltage
* P1694 - Tachometer Circuit High Voltage
* P1695 - Remote Keyless Entry Circuit Low
* P1696 - Remote Keyless Entry Voltage High
* P1700 - Transmission Control Module (TCM) Requested MIL Illumination
* P1701 - Trans. MIL Request Circuit
* P1705 - P/N Signal Output Circuit
* P1719 - Incorrect Shifting Detected (TCM)
* P1740 - Torque Reduction Signal Circuit
* P1743 - TP Signal from ECM
* P1760 - TCM Supply Voltage Interrupted
* P1779 - Engine Torque Delivered to TCM Signal
* P1780 - Park/Neutral Position [PNP] Switch Circuit
* P1781 - Engine Torque Signal Circuit
* P1790 - Transmission Control Module Checksum
* P1791 - Transmission Control Module Loop
* P1791 - Throttle/Pedal Position Signal (2000+)
* P1792 - Transmission Control Module Reprogrammable Memory
* P1792 - ECM to TCM Engine Coolant Signal
* P1793 - Transmission Control Module Stack Overrun
* P1793 - Wheel Speed Signal (2000+)

* P1795 - CAN Bus - Throttle Body Position
* P1800 - TCM Power Relay Control Circuit
* P1801 - Performance Selector Switch Failure

* P1804 - Ground Control Relay
* P1810 - TFP Valve Position Switch Circuit
* P1811 - Maximum Adapt and Long Shift
Old 05-14-2009, 02:04 AM
  #16  
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* P1812 - Transmission Over Temperature Condition
* P1813 - Torque Control
* P1814 - Torque Converter Overstressed
* P1815 - Transmission Range Switch - Start In Wrong Range
* P1816 - TFP Valve Position Sw. - Park/Neu. With Drive Ratio
* P1817 - TFP Valve Position Sw. - Reverse With Drive Ratio
* P1818 - TFP Valve Position Sw. - Drive Without Drive Ratio
* P1819 - Internal Mode Switch - No Start\Wrong Range
* P1820 - Internal Mode Switch Circuit A Low
* P1822 - Internal Mode Switch Circuit B High
* P1823 - Internal Mode Switch Circuit P Low
* P1825 - Internal Mode Switch - Invalid Range
* P1826 - Internal Mode Switch Circuit C - High
* P1831 - Pressure Control (PC) Solenoid Power Circuit - Low Voltage
* P1832 - Pressure Control (PC)/Shift Lock Solenoid Control Circuit High Voltage
* P1833 - A/T Solenoids Power Circuit - Low Voltage
* P1834 - Torque Converter Clutch (TCC)/Shift Solenoid (SS) Control Circuit High Voltage
* P1835 - Kick-Down Switch Circuit
* P1836 - Kick-Down Switch Failed Open
* P1837 - Kick-Down Switch Failed Short
* P1842 - 1-2 Shift Solenoid Circuit Low Voltage
* P1843 - 1-2 Shift Solenoid Circuit High Voltage
* P1844 - Torque Reduction Signal Circuit Desired By TCM
* P1845 - 2-3 Shift Solenoid Circuit Low Voltage
* P1847 - 2-3 Shift Solenoid Circuit High Voltage
* P1850 - Brake Band Apply Solenoid Circuit
* P1851 - Brake Band Apply Solenoid Performance
* P1852 - Brake Band Apply SolenoidLow Voltage
* P1853 - Brake Band Apply Solenoid High Voltage
* P1860 - TCC PWM Solenoid Circuit Electrical
* P1864 - Torque Converter Clutch Circuit
* P1865 - 4-5 Shift Solenoid (SS) Valve Control Circuit High Voltage
* P1866 - Torque Converter Clutch (TCC) Pulse Width Modulation (PWM) Solenoid Control Circuit Low Voltage
* P1867 - Torque Converter Clutch (TCC) Pulse Width Modulation (PWM) Solenoid Control Circuit High Voltage
* P1868 - Transmission Fluid Life
* P1870 - Transmission Component Slipping
* P1871 - Undefined Gear Ratio
* P1873 - TCC Stator Temp. Switch Circuit Low
* P1874 - TCC Stator Temp. Switch Circuit High
* P1875 - 4WD Low Switch Circuit Electrical
* P1884 - TCC Enable/Shift Light Circuit
* P1886 - Shift Timing Solenoid
* P1887 - TCC Release Switch Circuit
* P1890 - ECM Data Input Circuit
* P1890 - Throttle Position Signal Input
* P1891 - Throttle Position Sensor PWM Signal Low
* P1892 - Throttle Position Sensor PWM Signal High
* P1893 - Engine Torque Signal Low Voltage
* P1894 - Engine Torque Signal High Voltage
* P1895 - TCM to ECM Torque Reduction Circuit
* P2008 - Intake Manifold Runner Control (IMRC) Solenoid Control Circuit
* P2009 - Intake Manifold Runner Control (IMRC) Solenoid Control Circuit Low Voltage
* P2010 - Intake Manifold Runner Control (IMRC) Solenoid Control Circuit High Voltage
* P2066 - Fuel Level Sensor 2 Performance
* P2067 - Fuel Level Sensor 2 Circuit Low Voltage
* P2068 - Fuel Level Sensor 2 Circuit High Voltage
* P2096 - Post Catalyst Fuel Trim System Low Limit
* P2097 - Post Catalyst Fuel Trim System High Limit
* P2098 - Post Catalyst Fuel Trim System Low Limit
* P2099 - Post Catalyst Fuel Trim System High Limit
* P2100 - Throttle Actuator Control (TAC) Motor Control Circuit
* P2101 - Control Module Throttle Actuator Position Performance
* P2105 - Throttle Actuator Control (TAC) System - Forced Engine Shutdown
* P2107 - Throttle Actuator Control (TAC) Module Internal Circuit
* P2108 - Throttle Actuator Control (TAC) Module Performance
* P2119 - Throttle Closed Position Performance
* P2120 - Accelerator Pedal Position (APP) Sensor 1 Circuit
* P2121 - Accelerator Pedal Position (APP) Sensor 1 Performance
* P2122 - Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage
* P2123 - Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage
* P2125 - Accelerator Pedal Position (APP) Sensor 2 Circuit
* P2127 - Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage
* P2128 - Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage
* P2135 - Throttle Position (TP) Sensor 1-2 Correlation
* P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation
* P2176 - Minimum Throttle Position Not Learned
* P2500 - Generator L-Terminal Circuit Low Voltage
* P2501 - Generator L-Terminal Circuit High Voltage
* P2535 - Ignition 1 Switch Circuit High Voltage (PCM)
* P2610 - ECU Malfunction
* P2763 - Short to voltage in the TCC Solenoid
* P2764 - Open or Short to ground in the TCC PWM solenoid valve circuit
* P2A00 - HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 1 (PCM)
* P2A01 - HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 2 (PCM)
* P3000 - Hacking AWH Data
Old 05-14-2009, 02:05 AM
  #17  
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Some Ideas For Tuning With A Stall Or Without
First the best idea instead of listening to me is to take the car to and experienced tuner and let them do what they do. IMO

However since I get many calls about certain things, Here are a few things you should always do.

1-turn off the test for the codes po751 and po757 this will help avoid the limp mod after stall up or driving with a high stall converter.

2-Set lockup to happen only in 4th gear and above 40 mph .IMO

3-Set lockup so it cuts out under throttle way before the trans does a down shift. A down shift with lockup on can break hard parts in particular the input drum and shaft.

4-set the TCC duty cycle min and max at there highest setting though with our unit this would serve no purpose since we have mechanically set it to always be max. In any case this will help to prolong the life of the lockup clutch by reducing slipping.

5-Always with a built trans ours for sure set the line pressure tables at stock. Using tuning to raise line IMO is not the right way to get a firmer shift and has little or no affect on WOT shifts anyway.

6-shift points can be set wherever you like however remember that there is a delay mechanically from command to shift and this will vary with transmission condition, I have found from talking with customers that allowing 200 rpm for the 1-2 and 300 rpm for the 2-3 seems to work out in most cases. However the more power you make the more room you may need as the time for the trans to make the shift is a constant but as power increases the RPM rise is faster so more time is required. EXAMPLE" N/A verses SPRAYED.
For instance where it might take 200 rpm to make the shift N/A it might take 300 with a 150 shot. Also remember that RPM cannot be used as a stand alone to set shift points MPH comes into play also and additionally the KICK DOWN - speeds and throttle percentage also come into play I am told and affect the WOT up shift as well.

Now bear in mind I am not a tuner and these are actually things I have learned from actual tuners and customers doing there own tuning after solving different issues.
I do however have a copy of EFI LIVE I keep on my computer so I can at least us it to try and understand what I am told and read
Old 05-14-2009, 02:05 AM
  #18  
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PO121 or QUICK SHIFT 1-2-3-4 AT WOT after cam or throttle body install FIX
Found this on another forum posted as a single thread but wanted to have in this thread for easy reference also

PO121 CODE OR QUICK SHIFT 1-2-3-4 at WOT by 40 MPH FIX
Found this info on another forum and I know many people have popped up with this issue and wanted a fix. This would appear to be it. Hope it helps someone.

The curse of the P0121 Code... This code is infamous for giving people with larger cams fits...everything from traction control troubles, to shift point issues to just the good ole' P0121 code showing up for seemingly no reason making people scramble to purchase new Throttle Position sensors, adjust their set screws, etc, etc.

Before I go any further have a gander at the DTC information provided by LS2.com

http://www.ls2.com/boggs/dtcs/DTC%20P0121.htm

To outline a few key points

Quote:
The MAP is greater than 65 kPa

Quote:
The predicted throttle angle does not match the actual throttle angle

Quote:
All conditions present for 20 seconds

Now, that 65kpa map figure comes into play in nearly every LS1 Car/Truck because its the max map setting in most of the calibrations for the sanity test as shown here


Under normal circumbstances a stock cammed A4 will probably idle at around 35-40 map. When switching to a larger cam with more overlap your map readings could go up to as high as 70 or more kpa map which is way outside of the normal boundries. On a stock cammed car you'd probably need to be at around 30% tps to hit that same map number which is where that predicted throttle angle quote comes into play.

Now onto the last quote the 20 second timeframe. This will Usually come into play more often than not at idle with large cammed vehicles because many times your steady state map will be within the map sanity guidelines so there is a good possibity you might not see this code pop up immediatly.

There are a few ways you can cure this issue
a. Do as suggested in the help file which is to just set the min to 0 & max to 100
b. Adjust them to YOUR liking so you'll be within a reasonable limit. This will help determine if there IS a real issue with your TPS sensor later down the line.

So there you have it, as good an explanation I can come up with for that bastard code. So the next time you go WOT in your auto LS1 with a large cam & you go from 1st to 4th by 40mph or just a nagging p0121 code for no obvious reason you now have the info needed to fend it off.
Old 05-14-2009, 02:06 AM
  #19  
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How To Delete Po757 And Po751 Code With Hpt
>Go to VCM Editor
>Open you Bin file
>Go to Eng. Diagnostics
>Go to DTCs
>Scroll to p0757 or PO751
>leave enable box blank
>Next to that box you'll see 1 of these 4 settings
0-MIL on first error
1-MIL on second error
2-No MIL light
3-No error reported
> click on # 3 (no error reported)
>Flash PCM
Old 05-14-2009, 02:07 AM
  #20  
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How Gear Ratios, Power adders affect shift points and settings
First you must understand that when speaking of and auto trans at WOT"Max line pressure" the time from command to shift is a constant regardless of power it will remain the same, The trans when commanded to shift must either make the shift or slip. It cannot just say no.
Now there is however something that does change with lower gears sets and power adders that must be considered. RPM-Since both power adder and lower ratio change the rate at which RPM rise it must be taken into consideration. Since the shift time is a constant if the RPM rises at a faster rate more time must be allowed between desired and actual shift, Which is why for instance with ratio changes simply changing the ratio in the PCM may not be enough to stop the bouncing the rev limiter. Consideration must be allowed to the faster RPM increase this would also have to be considered with power adders such as N2O which is why you will hear people say that there trans shifts perfect N/A but hots the limiter on N2O.

And example and these numbers are random just for explanation. Lets say that with a 2.73 gear ratio it takes 200 RPM to complete a shift from command to actual (6200 commanded-6400 actual) with lets say 4.10 gears it may take 400-500 rpm and possibly more to complete the same shift(6200 commanded-6800 actual) Now if in addition you have a power adder like N2O this could e pushed even further not because the trans cant make the shift but again because the RPM are increasing at a greater rate in the given amount of time.
So when making gear ratio changes or power adding this must always be considered.
Also of note generally more time must be allowed for the 2-3 than for the 1-2 shift , The reason is on the 60e the shift to 2nd is very simple fluid is sent to the intermediate servo it moves and applies pressure to the band stopping the REVERSE INPUT DRUM and creating second gear where on the 2-3 shift more is o curing. Fluid must travel to both the 3-4 clutch set and simultaneously be fed to the back side of the servo to release the 2-4 band. So basically you have two chambers being filled at the same time with a given amount of fluid so it takes longer to complete this shift.

Additionally you may also note a small difference in the shift timing in D3 over D4 on the 2-3. Again in D3 something is different the OVERUN CLUTCH is also turned on during the 2-3 shift in this position so now you have 3 components being moved by a given amount of fluid further increasing the time from command to actual shift. This also must be considered when allowing the car to auto shift in the D3 position from second to third gear and would need to be allowed for.

Now all this time may e measured in 10th or 100th of a second but can make a considerable difference when trying to set a shift point near the rev limiter

Hope this information is use full for someone

Frank at PerformaBuilt


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