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2007 GMC Yukon XL 2500

Question: My check engine light stays on. The error message is P0604

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Viperd62, Tucson, AZ, December 22, 2011, 10:08

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The dealer here in Mexico says I need to replace the module. I want to take the vehicle to the US to get it fixed. Is it safe to drive about 1000 miles to get it there? The vehicle is performing good with no problems at all, just the light stays on.

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Answer #1

PARTS GUY December 22, 2011, 19:16

Master

P0604 Control Module Random Access MemoryPossible Causes Setting Conditions
•Clear the codes and retest the system.
•If the code remains, the control module must be replaced to correct this problem. A new module must be programmed with the correct software/calibration.
Engine cranking or key on for 5 seconds; and the Control module detected a problem with the Random Access Memory function. The control module performs an internal self-test on its Random Access Memory (RAM) or read/write memory. If this self-test fails, this code is set. Internal fault detection is handled inside the particular controller (e.g., inside the Fuel Pump Control Module or FECM with no external circuits).

This code sets in 1 Trip(s).

Are you having any issues with the transmission shifting?
This code will turn on the MIL (Malfunction Indicator Lamp)

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