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About Ray Niemi
Expertise
ASE Master Rated. Ask any questions about Volvo models up to 2000. Runnability, starting and charging system, diagnostic codes, brakes, front end, where to get certain parts. Should I buy this Volvo or not? I will try to answer your question and give you the knowlege to make the best decision in your case.

Experience
I started working on Volvo's in 1978 at the dealer and attended all the schools and achieved a Master rating. Since 1999 I have worked at independent shops and now own my own shop.

Organizations
Alldata on line repair manuals. IATN network of techs.
ASE rating of Master.

You are here: Experts > Shopping > Cars > Volvo > 1999 volvo check engine lite

Volvo - 1999 volvo check engine lite

Expert: Ray Niemi - 10/26/2009

Question
just got 2 new oxygen sensors -very expensive. But check engine lite is still on. Now the shop is saying it might have something to do with the ignition system. It is not heating up the sensors. Does that make sense. Can't get a NY inspection with a check engine lite on! We don't have all interior lites working-would that be relevant? Thanks - you have helped us before.

Answer
Kathy Rich,
There are heating elements in the H02S that would require power to them. Maybe the power to the heating elements has been cut off. I am not sure if the interior lights have something to do with it or not. Maybe the fuse for the lights is also for the heating elements.
Yes the exhaust heats up te H02S but they have a heating element to heat them quickly and keep them at a certain tempature. That make them more efficient.

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