Multiple Control Module Codes

[mjlock]

Randomly this week without warning my check engine light came on. Like usual, I figured it was another notorious Fuel Evap. code. I tried to reset the power but the check engine light stayed on so i went and had the codes read. A total of 14 codes came up (See below). Any recomendations on my next step? What to check, what to replace?

 

And by the way, the truck has no noticeable changes since the codes showed up. everything is running as normal.

 

Codes:

U0073- Control Module Comm Bus Off

P069E / P064A- Fuel Pump Control Module

P0193- Fuel Rail Pressure Sensor Circuit High

P0232- Fuel Pump Module Control Circuit high

P025A- Fuel Pump Module Control Circuit Open

P0601- ICM Memory Check Sum Malf.

P0602- PCM Program Malf.

P0603- ICM Keep Alive Memory Malf.

P0604- ICM Random Access Memory Malf.

P062F- ICM Malf.

P06A6- Sensor Reference Volt A Circuit Range

P2635- Fuel Pump A Low Flow

U0100- Lost comm w/ ECM / PCM

 

Any help or suggestions are appreciated.

Thanks in advance.

 

Mike

[Supreme Pizza]

You got some serious issues with... something.

 

I would start by unplugging the battery and let it sit over night with the headlights on.

That will 100% completely reset the computer.

 

After that:

 

1) Disconnect the ECM, to check for a bad connection.

2) Check for any loose or poorly grounded wiring harness or engine ground cables.

3) Take her to a dealer that agrees to just do a diagnostic, so that YOU can replace the parts that are bad. Make sure they know its not a free for all , here is my credit card type of thing.