Question about 2002 Jeep Grand Cherokee

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2002 Grand Cherokee P0601 Error

I also have this error on a 02 grand. Is there any other known issue that might cause this error? Jeep runs great otherwise, but I cant pass a emission test with the light on.

I just bought this jeep, and someone replacing a rear o2 broke the harness clip, which let the wiring fall onto the hot exhaust pipe and burn it off, shorting the o2 out. I changed the sensor and installed a new fuse in the underhood power distribution. The p0601 is now the only code I am getting. I can clear it out but it will be back within a trip or so.

I just want to make sure im not missing something before I put out the money for a new pcm. Thanks to all!

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P0601 is an internal PCM failure. It is not passing one of it's self-tests and the code sets. The only fix for this code is to replace the PCM.

Posted on Jun 15, 2009

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