DTC codes

By Tim Chizo
March 2, 2007 in Ask A GM Technician

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Tim Chizo

Posted March 2, 2007

I'm having a couple of codes pop up when I get the check engine light on and they are not in the book.

P7400 Manufacturer Specific

P9600 Manufacturer Specific

Pff00 Manufacturer Specific

Anyone have an idea what these are?

Thanks

2 weeks later...

ryank1

Posted March 11, 2007

I have checked GM service manuals and those codes are not listed and I have never seen them. Try a different scanner.

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