karen_krueger5

C2 DPF and exhaust pressure issue

My 2009 Citroen C2 diesel is having issues. It has 48657 km on it. A warning light is on, engine power is reduced, and there's smoke during acceleration plus a strong exhaust smell. I suspect the DPF, specifically low exhaust pressure, but I'm unsure. Could a defective exhaust back pressure sensor cause this?

A 2009 Citroen C2 diesel experienced reduced engine power, a warning light, smoke during acceleration, and a strong exhaust smell, suspected to be related to the DPF and low exhaust pressure. The potential cause identified was a defective exhaust back pressure sensor, which could prevent the DPF regeneration process. After professional diagnosis, the sensor was confirmed faulty and replaced, resolving the issues.

Did this summary help you solve your problem?

4 comment(s)

I had a similar problem with my C2's DPF. Low DPF pressure can indeed cause those symptoms. Have you tried forcing a DPF regeneration? It might clear the blockage if it's not too severe. Otherwise it could be the sensor as you mentioned. Does the problem occur often?

I haven't attempted a forced regeneration. I wanted to rule out potential sensor issues first. 'Regeneration' refers to burning off the particulate matter, correct? If the sensor is faulty, could it provide incorrect readings that prevent regeneration?

Yes, regeneration is the process of burning off the soot. A faulty exhaust back pressure sensor can definitely prevent the regeneration cycle, as the ECU relies on its readings to determine when and how to perform it. Given the symptoms, it's worth having it checked professionally. It can be difficult to diagnose these things yourself.

Thanks, that confirms my suspicions. I took it to a workshop; the exhaust back pressure sensor was indeed defective. Replacement and labor cost 245€. The issues are resolved.

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

CITROEN

community_crosslink_rmh_model