These codes are for low and intermittent TPS voltage.

Are these common?

Is there something I can clean, or does the TPS need to be replaced?

I logged some cruising and the TPS value appeared normal.

Thanks for any ideas.

 

Did you go into limp mode? I pulled these codes when my x-link went bad

 

No limp mode and no flashing light. Just a steady light. Actually it went off today (2 days later). What is xlink?

 

These codes only apply to mechanical throttle bodies, not the newer drive by wire units.

Could be an internal break in the wires, a short, poor ground, loose connector, wet connector, low system voltage, bad sensor.......The code will clear after X key-on cycles if the problem does not recurr.

 

Anyone else ever had this? My truck is in the body shop, but I want to fix it when I get it back. I will check the things Dr X said, but nothing on my truck has ever broken that wasn't VERY common on these boards. So I'm hoping it has happened before and someone can tell me EXACTLY where to look.

 

I've heard of the wires to the TPS either getting burnt or broken...

 

What is the normal TPS voltage at 0% throttle? Mine is .31 volts.

Is this voltage below the normal threshold?

Can I adjust the TPS or does it need to be replaced?

 

P0122 = Hard Failure(non-intermittent) TPS less than .2V for 10 sec
P1122 = Intermittent

Problem could be: the wiring, a bad 5V reference, the connector, the sensor, low system voltage......

From the Manual.........

P0122

Circuit Description

The throttle position (TP) sensor is a potentiometer. The TP sensor is mounted to the left side of the throttle body. The TP sensor provides a voltage signal that changes relative to throttle blade angle. This signal voltage is one of the most important inputs used by the powertrain control module (PCM). The TP sensor has a 5.0 volt reference, a ground, and a signal circuit.
TP sensor signal voltage should be near 0.6 volt at idle. The TP sensor voltage should increase to above 4.0 volts at wide open throttle (WOT).
When the PCM senses a signal voltage lower than the normal operating range of the sensor, this diagnostic trouble code (DTC) sets.

Conditions for Running the DTC

The ignition switch is in the ON position or the engine is operating.


Conditions for Setting the DTC

• The TP sensor signal voltage is less than 0.2 volts.
• The above conditions are present for 10 seconds.

Action Taken When the DTC Sets

• The PCM illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
• The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records.
• The PCM uses a default TP sensor value.
• The transmission line pressure increases.
• Firmer transmission shifts

Conditions for Clearing the MIL/DTC

• The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Use a scan tool in order to clear the MIL and the DTC.