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Terrano DPF warning light and power loss

I'm having trouble with my 2006 Nissan Terrano diesel (119,621 km). The speedometer warning light came on, and I've noticed a drop in engine power when accelerating. There's also quite a bit of smoke and a strong exhaust smell. I suspect it might be related to the diesel particulate filter (DPF). I've read that low exhaust pressure could be the culprit. Has anyone else experienced similar DPF issues with their Terrano's exhaust system?

A 2006 Nissan Terrano diesel is experiencing a DPF warning light, power loss, excessive smoke, and a strong exhaust smell. The issue is suspected to be related to the diesel particulate filter (DPF) and possibly a defective exhaust back pressure sensor causing low exhaust pressure. A suggested solution is to force a DPF regeneration and have the exhaust back pressure sensor checked by a professional. The problem was confirmed to be a defective exhaust back pressure sensor, which was subsequently repaired.

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4 comment(s)

Hey, I had something similar happen with my Terrano. Smoke and power loss sound familiar. Did you try forcing a DPF regeneration? It might be clogged, but low pressure sounds like a sensor issue.

Thanks for the quick reply! I haven't tried forcing a DPF regeneration yet. I will look into that, but can you elaborate a bit more on the sensor issue you had? What exactly was wrong, and how did you diagnose it? By 'low pressure' I'm suspecting the exhaust back pressure sensor is defective. Did your symptoms align with a faulty exhaust back pressure sensor?

Yeah, my symptoms were very similar. The garage checked it out and said it was the exhaust back pressure sensor. Honestly, I don't know much more than that. I'd suggest getting it checked by a professional to be sure.

Appreciate the insight! I'll take it to a workshop and have them check the exhaust back pressure sensor. Turns out you were spot on, the garage confirmed it was a defective exhaust back pressure sensor, which caused the low pressure reading. Repair cost was 245€.

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NISSAN

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TERRANO