fatboyss Posted November 17, 2004 Report Share Posted November 17, 2004 My engine light is on so i went to auto zone to get it checked out.... The reading was P0442 The PCM has determined that a small leak exists in the evaporative emission control system.... Does anyone know what exacly this means. any help would be appreciated. Link to comment Share on other sites More sharing options...
marc_w Posted November 17, 2004 Report Share Posted November 17, 2004 Could be that the gas cap was put on too loose? Link to comment Share on other sites More sharing options...
cokedrvrbjw Posted November 17, 2004 Report Share Posted November 17, 2004 I was told on my last vehicle that if the light comes on its not major...but if it blinks constantly then it is. So it probably was the gas cap loose or did you fill up while it was running, that could be it. Link to comment Share on other sites More sharing options...
fatboyss Posted November 17, 2004 Author Report Share Posted November 17, 2004 I didnt fill up while the truck was running, and i was told the same thing about the gas cap and it was on tight... Anybody know anything about that code?? Thanks for the suggestions though Link to comment Share on other sites More sharing options...
vdrumright Posted November 17, 2004 Report Share Posted November 17, 2004 I've got the same code before. It was the gas cap. Link to comment Share on other sites More sharing options...
blownchevy Posted November 17, 2004 Report Share Posted November 17, 2004 Cap, No question about it. Link to comment Share on other sites More sharing options...
BenKey Posted November 22, 2004 Report Share Posted November 22, 2004 I was told on my last vehicle that if the light comes on its not major...but if it blinks constantly then it is. So it probably was the gas cap loose or did you fill up while it was running, that could be it. <{POST_SNAPBACK}> A blinking SES only happens when there are things happening present that may damage the engine - from what I understand. That's why you should never drive with one. A normal, non-blinking SES, still indicates a possible problem and should be taken care of or investigated. Link to comment Share on other sites More sharing options...
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