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2003 Chevrolet Express 2500 Question: check engine light

 

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Visitor, 5.3L V8, Lake Zurich, IL, June 10, 2011, 23:50

My check engine light would sometimes come on in the winter. This last winter it did not. Now it came on about a week ago. I went to autozone to have them pull the code and the instrument say it must be connected to vehicle. I'm trying to figure out why it won't read the code.

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  • Answer #1

    DaveJHM June 11, 2011, 00:36
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    I would recommend a proper diagnosis be performed by a qualified technician, not a clueless parts store trying to sell you parts based off of a code pull...that they apparently aren't capable of doing.

    It's possible you may have a blown data link fuse?

    In any case, check engine lights can come on for many reasons, and only a true diagnosis can get to the bottom of the problem.

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    Visitor, June 11, 2011, 17:09

    It wouldn't read because the fuse for the lighter was blown. Go figure. Anyhow it was a p0442 which is with the evaporative system. Thanks for tryiing

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    DaveJHM, June 11, 2011, 23:42
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    Yes, the lighter fuse is also what powers your data link. So - indeed so.

    P0442 - yes, have your evap system diagnosed.

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