vivienknight8

S40 oxygen sensor fault

Check engine light on my 2010 Volvo S40 diesel, error memory says oxygen sensor faulty, and fuel consumption is up. I think the cable or plug connection might be dodgy. Anyone else experienced similar?

A 2010 Volvo S40 diesel is experiencing a check engine light due to a faulty oxygen sensor, leading to increased fuel consumption. The initial suspicion is a possible issue with the cable or plug connection. A similar case was resolved by replacing the faulty sensor at a workshop, suggesting that professional diagnosis and repair might be necessary to address the problem effectively.

Did this summary help you solve your problem?

4 comment(s)

I have an S40 too, and I had similar issues a while back! O2 sensor was throwing codes, and my fuel economy was terrible. Did you check all the wiring thoroughly? Sometimes it's a pain to spot the exact break or corrosion.

Cheers for the reply! I gave the wiring a good once-over, but honestly, it's hard to be 100% certain without proper testing equipment. Did you manage to sort it out yourself, or did you end up taking it somewhere?

I messed with it for a bit, cleaning contacts and all that, but in the end, I just took it to a workshop. Turned out the sensor itself was kaput; they swapped it out, and all good. Cost me about 95€, sensor and labor included.

Thanks a bunch! Sounds like I'm heading for the workshop then. At least I have a better idea of what to expect. Hopefully, it's just the sensor. Fingers crossed!

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

VOLVO

community_crosslink_rmh_model

S40