fionathunder51
V90 Engine Running Rich
Summary of the thread
A 2018 Volvo V90 diesel was experiencing issues with the engine running rich, leading to reduced power, rough running, increased fuel consumption, and jerking during acceleration. Possible causes discussed included faulty spark plugs, a defective oxygen sensor, intake manifold issues, or a defective injector. After taking the car to a workshop, it was confirmed that a defective injector was the problem, and replacing it resolved the issues.
Did this summary help you solve your problem?
4 comment(s)
fionathunder51 (community.author)
Thanks for the reply! I haven't checked the spark plugs recently, but I had them replaced about 50,000 km ago. I'm not sure about the oxygen sensor. Is there an easy way to test the oxygen sensor or the injectors without special tools?
Baumi
Testing the oxygen sensor or injectors properly usually needs diagnostic equipment. Given all the symptoms, and the mileage, a defective injector is a strong possibility. Could also be some other sensor giving wrong readings. At this point, it might be best to get it to a workshop for a proper diagnosis. Saves you potentially throwing parts at it.
fionathunder51 (community.author)
Thanks, I appreciate the advice. I took it to the shop, and you were right - it was a defective injector. Got it replaced, and the total cost was 515€. Runs like new again!
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
V90
Baumi
Running rich, eh? Hmm. Rough running and poor fuel economy could point to a few things. Have you checked the spark plugs? When was the last time the oxygen sensor was replaced? An issue with the intake manifold might also cause this. A defective injector could also be the culprit. Any recent work done?