check engine light

Asked by gvgregory Mar 24, 2013 at 03:31 PM about the 2001 Volvo S40

Question type: Maintenance & Repair

What are possible causes for this. O2 sensor?

3 Answers

migration_judge_roy answered 11 years ago

You've overfilled your gas tank drowning the charcoal canister forcing the computer to not sense any back pressure, and not able to purge correctly- couple of months with this and the "black tape" solution would be okay, but we'd have to know that this was the only reason.

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tenspeed answered 11 years ago

There are around one thousand engine trouble codes. It could be anything. Get the codes read, write down the number and post it.

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