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Yes I have code po496 po171 po420 do all of these have something in common or can you tell me what seems to be the issue with it I have taken it to 3 shops and seem to not fixed anything

Answers from the Automotive Experts

Jessica Howe, Automotive Expert & Coach at AskPatty.com

Hello, 

Thank you for writing in. When considering all of the codes you have currently, I suspect you have an issue with the canister purge valve. If the EVAP system isn't able to control the amount of vapor being released from the system, you will end up with a lack of power and improper fuel/air ratios. The canister purge valve itself is relatively cheap, and installation shouldn't be hard. Good luck!


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