Close
Car Questions
RepairPal is your advocate for car care advice and guidance

Replacing the gas cap

(2006 Buick Terraza)
in Houston, TX on April 01, 2011
A couple of months ago my check engine light came on and my indicator warning periodically will flash check gas cap. I read the post about the loose gas caps so I bought a new one, but the light never went off and the indicator warning still flashes sometimes. I took the van to auto zone and had them run the codes and it came back with P0449 and P0455. Can you tell me what I should do?
Displaying 1 answers & 0 comments
Popular Answer
on April 01, 2011
Yes these codes are for evaporative system malfunctions. P0455 is a very large or even gross leak and a P0449 is for a defective Evaporative Vent Solenoid Valve not working, which would trigger the P0455. A defective Vent Solenoid is pretty common on GM, I have replaced several.

here are some shops:

https://repairpal.com/buick-repair-in-houston-texas
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more
Didn't find what you were looking for?