Question about 2005 Buick LeSabre
Could not go thru emission testing because check engine light is on. Had the code read why it was on. have a P0442 code, EVAP system small leak detected
Posted by Anonymous on
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Posted on Jan 02, 2017
Usually the source of the leak is the gas cap (either loose or defective) but if that doesn't apply to your issue then the canister is next to the gas tank.
Posted on Jun 09, 2009
I don't remember the exact code, but try re-tightening the gas cap. Give it at least a full turn (when it starts clicking). Wife had a code that was worded similar on her '01 Monte Carlo. After doing that reset the code and see if it shows up again.
Hope this helps.
Posted on Nov 14, 2009
SOURCE: Check engine light
Code PO442 means you have a small leak in your evap system. Codes PO452 & PO453 refer specifically to the fuel thank.
Although it will be a good idea to change your gas cap, I don't think it is where your problem is coming from.
I would check the vacumm hoses for loose fitting or small cracks.
Specially if you had your car worked on recently.
Posted on Mar 09, 2010
Finding a leak in these emission systems is almost impossible.
All it takes is a pin hole in a hose to screw up the whole system.
The best way to find the leak is to take and have a smoke test done on it. Smoke is injected into the system and where ever the leak is , the smoke will leak out of it. It's faster and more reliable then replacing hoses and other things you don't need. Call dealers, or repair shops to see who does smoke tests.
Posted on Apr 23, 2010
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