janaherrmann4
S40 rough running and exhaust smell
Summary of the thread
The 2007 Volvo S40 is experiencing rough running, a check engine light, an exhaust leak, and a strong exhaust smell. A defective lambda (oxygen) sensor is suspected as a possible cause. Suggestions include checking the oxygen sensor, exhaust pipe for leaks, and the EGR valve. Ultimately, the lambda sensor was confirmed to be defective and was replaced.
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4 comment(s)
janaherrmann4 (community.author)
Thank you. Could you elaborate on 'similar issue'? Was it the same symptoms?
Nobby
Yes, all the same symptoms. Rough running, the smell, and the check engine light. I tried a few things myself, but honestly, I'd just take it to a workshop. They'll sort it quicker and you won't be pulling your hair out.
janaherrmann4 (community.author)
Understood. Thank you. The lambda sensor was indeed defective. The repair cost was 375€.
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VOLVO
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S40
Nobby
Sounds familiar. I've got an S40 too. Had a similar issue with the exhaust. Check the oxygen sensor and the exhaust pipe for leaks. Could also be the EGR valve.