alexanderfrost6

S40 EGR Valve Symptoms

I'm having issues with my 2012 Volvo S40 diesel engine at 125818 km. I think the EGR valve might be faulty. I've got reduced engine power, a check engine light, smoke on acceleration, rough running, high fuel consumption, jerking, and a loud hissing noise when I accelerate. Any ideas?

A 2012 Volvo S40 diesel engine is experiencing reduced power, a check engine light, smoke on acceleration, rough running, high fuel consumption, jerking, and a loud hissing noise. These symptoms suggest a potential issue with the EGR valve, possibly due to a blockage or vacuum leak. Cleaning the EGR valve might not resolve the issue, and professional inspection at a workshop is recommended for accurate diagnosis and repair.

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4 comment(s)

I had almost the exact same problems with my S40! Does it also feel like it's struggling to breathe, especially uphill? I'm no expert, but could you have a vacuum leak somewhere? That loud hissing sounds suspicious. I had rough idle too.

Thanks. Yes, it feels like it's struggling to breathe. The hissing makes me think vacuum leak, but could that cause all the other symptoms? It all started suddenly.

Yep, sounds like what I went through. I tried cleaning the EGR valve myself but it was a waste of time. Get it checked by a workshop, they'll know what to do. Save yourself the headache. Mine was a blocked EGR valve.

Thanks, I'll book it in with a workshop for a check. Appreciate you sharing your experience; it's been helpful.

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VOLVO

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S40