willischulze19

Movano DPF Regeneration Failure

Having trouble with my 2008 Renault Movano diesel. A warning light keeps popping up, and there's quite a bit of smoke when I accelerate. Scan suggests the DPF isn't regenerating. Suspecting it's the exhaust back pressure sensor. Anyone run into this? Any thoughts before I start tearing things apart?

A 2008 Renault Movano diesel is experiencing issues with a warning light and excessive smoke during acceleration, linked to a failure in DPF regeneration. The suspected cause is a faulty exhaust back pressure sensor, which is crucial for proper DPF function. After checking for visible damage and considering testing options, it was advised to consult a workshop. The diagnosis confirmed the sensor was defective, and replacing it resolved the problem, restoring normal vehicle operation.

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4 comment(s)

I had similar issues with my Movano. The exhaust back pressure sensor monitors the exhaust gas pressure, needed to correctly operate the engine and especially important for DPF regeneration. When it fails, regeneration is not possible anymore. Have you checked the sensor itself for any obvious damage or loose connections?

Thanks for the quick reply! I gave the sensor a once-over, but didn't see anything obvious, like melted wires. Is there a specific way to test it, maybe with a multimeter? Or am I better off just replacing it?

Testing it with a multimeter is possible, but you'd need the correct values for comparison, which can be hard to find. Considering the symptoms and the error code, the sensor is the most probable cause. I would suggest visiting a trusted workshop and have them check it out.

Appreciate the advice! Took it to the shop, and you were spot-on. The exhaust back pressure sensor was indeed defective. Replacement cost me around 245€, but at least the van's running smoothly again. No more smoke, and the DPF is regenerating as it should. Thanks again for the help!

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RENAULT

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MOVANO