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Discussion Starter · #1 ·
i had the same problem like a lot of you here, it was on and off all the time...in the end my dealer said there was something wrong with back part of lambda sensor, changed it, and for a week nothing, and hopefully it will stay that way. so if anyone is interested it was some back (or outgoing?) part of lambda sensor...<br>also installed bsr stg. 1 and remus exaust original foe s40 t5 not universal..<br>That is what this car should have been like from the start...sound is a lot better, but not loud at all...more powerfull...and bsr-sweetttttttt
 

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Re: check engine light (garavac)

Lambda sensors are one piece, but there are two of them. Sometimes they're referred to as front and back. The front one is in the exhaust manifold, the back one is in the catalytic converter. They can go bad, but it's quite a reliable part in general.<p>Did you see the recent <A HREF="http://www.swedespeed.com/news/publish/Volvo_News/article_800.html" TARGET="_blank">"30 Years of Volvo's Revolutionary Lambda Sensor"</A> by the way?<p>Tom.
 
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