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florianfuchs2

Trax DPF Issues

Hi, I have a 2018 Chevrolet Trax diesel. Lately, I've been getting a warning light, reduced engine power, smoke during acceleration and a strong exhaust smell. Mileage is at 69247 km. I think it might be a DPF issue, maybe exhaust back pressure too low?

Summary of the thread

A 2018 Chevrolet Trax diesel was experiencing a warning light, reduced engine power, smoke during acceleration, and a strong exhaust smell, suspected to be related to a DPF issue or low exhaust back pressure. The problem was identified as a faulty exhaust back pressure sensor, which can cause DPF issues and prevent proper regeneration. The solution was to replace the sensor, resolving the symptoms.

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4 comment(s)

felixschubert61

Sounds familiar. I had something similar with my Trax (petrol, though). Check your exhaust back pressure sensor. If it's faulty, it can cause all sorts of DPF issues and trigger those symptoms. Is it trying to do DPF regeneration?

florianfuchs2 (community.author)

How would I check if it is trying a DPF regeneration? I'm not super technical.

felixschubert61

You'd usually notice the engine idling higher, maybe a change in exhaust sound, but if you're getting low pressure readings, the ECU might not even be attempting a regen. Honestly, with those symptoms, get it checked at a workshop. A defective sensor can mess things up and eventually cost you more.

florianfuchs2 (community.author)

That's helpful. Took it to the shop; you were right, it was the exhaust back pressure sensor. Cost me 245€ to replace. All good now.

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CHEVROLET

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TRAX