marieschaefer2

Citan NOx issues

My 2022 Mercedes Citan with a gasoline engine has the check engine light on, showing error codes related to NOx storage catalyst aging at 32800 km. I also noticed some exhaust leaking. Could this be related? I'm concerned about fuel efficiency and emissions system effectiveness.

A 2022 Mercedes Citan with a gasoline engine exhibited a check engine light and error codes related to NOx storage catalyst aging at 32,800 km, alongside an exhaust leak. The exhaust leak was suspected to interfere with oxygen sensor readings, affecting the emissions system and fuel efficiency. A professional inspection confirmed the exhaust leak, which was repaired, resolving the issue.

Did this summary help you solve your problem?

4 comment(s)

I had similar problems with my emissions system on a 2018 Vauxhall Astra, although not the exact same error. An exhaust leak can definitely mess with the readings from the oxygen sensors and throw off the whole emissions system. Has your fuel efficiency taken a hit? Is the smell of exhaust stronger than usual?

Yes, fuel efficiency seems slightly reduced. Regarding the exhaust system leak, where was the leak on your Astra?

Mine was at the flex pipe, a common failure point apparently. Since you have exhaust leaking and NOx errors, I'd strongly suggest getting the exhaust system checked professionally. It could save you money in the long run and is better for air quality anyway.

Thanks for the insight. I took it to a workshop, and it was indeed a leak in the exhaust system. Repair cost 265€. Problem solved.

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

MERCEDES

community_crosslink_rmh_model

CITAN