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I have a p0442 engine code on my 2002 gmc sonoma?

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P0442 - Evaporative Emission (EVAP) System Small Leak Detected.In this instance first thing I would check is the gas cap to make sure its tight and the seal that meets up with the filler neck is not cracked.Rust built up on the filler neck can sometimes cause a poor seal.

Posted on Sep 03, 2010

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On my second gas cap in a year and a half. A new cap fixes the problem for a while. but am tired of spending $100 to the dealer each time I get a service engine light to find out the code. They tell me it could be anything and I feel they get me into the panic mode because you need your car to run right and I have no way to figure these things out. If there way a way to find out the codes without going to the dealer I'd jump on it.

Posted on Mar 15, 2012

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Posted on Jan 02, 2017

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SOURCE: Engine error code of P0442 on GMC Sierra 1500 need solutions please.

the had a problem with the vent solenoid and changed designs may time

Posted on Jun 01, 2012

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I have a 2006 GMC 1/2 ton pickup with 5.3 V8. Engine light came on and upon checking, it has a P0442 and P0442 P code. Any suggestions on this? Also how do I erase the engine light.


You erase the engine light by fixing the problem . With every DTC - diagnostic trouble code there are diagnostic flow chart's , steps to find the problem .

DTC P0442 : Evaporative Emission (EVAP) System Small Leak Detected

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Do you notice problem like vehicle stalls,low idle, then it can be due to faulty EGR valve.
Also is there check engine light ON.If yes,then get the vehicle scanned.It will tell what is the problem as per error codes.

For EGR valve location and more details,click the link below:---
http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html
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These will help.
Thanks.

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Engine error code of P0442 on GMC Sierra 1500 need solutions please.


the had a problem with the vent solenoid and changed designs may time

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