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Rear heated oxygen sensor compensation 1995 850 20 Valve

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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iankleinfeld
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Joined: 4 January 2005
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Rear heated oxygen sensor compensation 1995 850 20 Valve

Post by iankleinfeld »

I recently had the check engine light go on, got code 4-3-6, which is Rear heated oxygen sensor compensation. OK, now what is that? I know what a rear O2 sensor is but what is compensation and how do I fix it? Can't find anything anywhere.

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