Went riding around the farm looking for some hogs to shoot. Went down to the creek and put it in 4wd to put put around. started to leave and had to go up a pretty steep hill thats all soft sand. Just about didnt make it. Anything over half throttle and it choked out. Looked at the scan gauge and saw -10* timing hahahah uh oh.

hit the scan button and saw P0300, P0327, P0161,P0135,P0650, P06332. Cleared them and held it to the floor and made it out of the creek.

Kept riding around for a lil while and went back to the shop and all the codes had come back so i called it a night.

I had the shifter in drive when i cleared the codes and now the cluster is starting in neutral.. fun fun fun!!

 

After a couple ign cycles the Cluster starts working again but it wont show neutral. So i have to clear the codes to get Neutral to put it in 4LO. And clear them again to get it back into 4HI.

 

That's pretty wild to throw all those codes. Not much help, but I did find this on p0650.

P0650

Description
Malfunction Indicator Lamp (MIL) Control Circuit Output drive moduels (ODM’s) are used by the powertrain control module (PCM) to turn on many of the current-driven devices that are needed to control various engine and transaxle functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device whish the PCM is commanding ON. Unlike quad diver modules (QDM’s) used in prior model years, ODM’s have the capability of diagnosing each output circuit individually. DTC P0650 set indicates an improper voltage level on the output circuit that control the MIL.

Symptoms
The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store the conditions, which were present when the DTC set as Freeze Frame and Failure Records Data only.
If the misfire is determined to be catalyst damaging, the PCM will flash the MIL.
Causes
An improper voltage level has been detected on ODM D output 1 (the MIL control circuit)
The above conditions are present for at least 30 seconds.

Solutions
Check for the following conditions:
A faulty connection at the PCM – inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connections.
Inspect the wiring harness for damage.
If the harness appears to be okay, disconnect the PCM, turn the ignition ON and observe a DMM connected between the MIL control circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the MIL. A change in voltage will indicate the location of the fault.
Located the MIL fuse. If the fuse is open, locate and repair a short to ground in the MIL ignition supply circuit or a shorted cluster. Inspect the MIL fuse and replace as necessary. Did you find and replace the blown fuse and make repairs?
Yes – Clear the DTC.
NO – Turn the ignition OFF and disconnect the PCM. If the jumper fuse opens, locate and repair a short to voltage in the MIL control circuit or a shorted cluster. Install a 3amp fused jumper between the MIL control circuit at the PCM harness connector and a good ground. Turn the ignition ON with the engine off. Is the MIL illuminated?
YES – Leave the ignition on and remove the jumper. Is the MIL still illuminated?
YES – Remove the instrument cluster. Test the MIL control circuit for a short to ground and repair as necessary. Did you fin and repair the condition?
YES – Clear the DTC
NO – Inspect the PCM and PCM harness connector for faulty connections and repair as necessary. Did you find and correct the connection?
YES – Clear DTC
NO – Replace the PCM
NO – Remove the instrument cluster. Test the MIL control circuit for a short to ground and repair as necessary. Did you fin and repair the condition?
YES – Clear the DTC
NO – Test the MIL ignition supply circuit for an open and repair as necessary. Did you find a problem and correct?
YES – Clear the DTC
NO – Inspect the cluster harness connector for faulty connections and repair as necessary. Did you find and repair the condition?
YES – Clear the DTC
NO – Repair or replace the cluster. Did you complete the repair or replacement?
YES – Clear the DTC

 

Woops.. it was in my 2003 Z71 tahoe.

 

Ever figure out what was going on?

 

Na not yet.. got some intake gaskets, knock sensors and O2 sensors to put on it. Just gotta get around to working on it.
It still runs and if i start to get bogged down ill clear the codes and put it in 4Lo..
It has some power for a lil while.