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2001 v40 p0133 mystery

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40
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rustyoldman
Posts: 1
Joined: 2 July 2011
Year and Model: 96 850 wagon
Location: rainbow lake newyork

2001 v40 p0133 mystery

Post by rustyoldman »

the devil's own v40 is at my shop after 2 dealers and another independant.the weird thing is,if i unplug the f oxs the p0133 is still there(along with p0030 from being unplugged),but when i unplug the rear oxs the p0133 goes away.i understand,more or less,what that code means,and this doesn't make sense.
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pmondrian
Posts: 20
Joined: 19 July 2013
Year and Model: S40, 2004.5, 2011
Location: Princeton

Post by pmondrian »

I replaced both oxygen sensors whem i got the p0133 code and it went away.

I've read that different code readers confuse the front and rear oxygen sensor codes.
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