gerhardwolf79

Croma DPF regeneration exhaust sensor

I'm pulling my hair out! My 2008 Fiat Croma, diesel engine, has been a nightmare lately. The warning light is on, and when I accelerate, there's a smoke screen behind me. A diagnostic said the DPF isn't regenerating. After digging, it looks like it's the exhaust back pressure sensor. Does this sound right? Has this happened to anyone else?

A 2008 Fiat Croma with a diesel engine is experiencing issues with the DPF not regenerating, accompanied by a warning light and excessive smoke during acceleration. The problem is suspected to be caused by a faulty exhaust back pressure sensor, as indicated by erratic diagnostic readings. Replacing the sensor is suggested as a solution, with a similar case confirming that this resolved the issue, eliminating the smoke and allowing the DPF to regenerate properly.

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4 comment(s)

Whoa, sounds familiar! I have a Croma too, and I had very similar issues a while back. The smoke and the DPF thing are dead giveaways. Did they actually test the sensor, or just guess? Because in my case, it caused the car to run rough.

They ran a test and the readings were way off, apparently erratic. So you think it's definitely the exhaust back pressure sensor then? Was it a pain to replace? Did it completely solve the problem? I just want to be sure before I shell out the cash.

Yep, sounds like the exact same thing. The wonky readings are the classic symptom. Honestly, I wouldn't mess with replacing it yourself unless you're really confident. I ended up taking mine to a workshop, and they sorted it out pretty quickly. It solved all my issues. Smoke was gone, and the DPF started regenerating again.

Thanks a million for the help! I feel much better knowing someone else had the same problem and got it fixed. I'll book it into the workshop then and get that sensor replaced. Hopefully, that'll be the end of it. The bill should be around 245€, so I hope there are no other surprises. Fingers crossed!

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FIAT

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CROMA