supreme_style21 Posted April 6, 2010 Report Share Posted April 6, 2010 My brother just bought an '05 Grand Prix gt2. It's throwing an emissions code P0455 It's the 3.8 with 78k on it. He's replaced the gas cap with one straight from the dealership, twice. That's all he's done. It's still throwing the code. If the code is cleared, it just takes a short trip to throw the SES light again. What could be some things to check? Quote Link to comment Share on other sites More sharing options...
BXX Posted April 6, 2010 Report Share Posted April 6, 2010 Get a vent solenoid, should be around $25. slap it on, clear the code and all should be well. While your at the vent solenoid, check the wire connection for damage or corrosion and for a possible deteriorated hose back there, But the vent solenoids are sooooo very common on the GMs to fail and they throw a P0455. Already had to do one on my 06 Impy Quote Link to comment Share on other sites More sharing options...
supreme_style21 Posted April 7, 2010 Author Report Share Posted April 7, 2010 That's exactly what it was! Changed it and all is well now thanks ! Quote Link to comment Share on other sites More sharing options...
BXX Posted April 8, 2010 Report Share Posted April 8, 2010 Sweet! Glad you got it fixed! Quote Link to comment Share on other sites More sharing options...
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