100% Free

No Scanner Needed

Carly logo
Prices

christopherrichter23

C4 collision avoidance error

I've got a 2008 Citroen C4 diesel with 113242 km. I'm getting an error message and warning light, plus the error memory stores an error. It seems to be affecting other systems. I suspect it's the radar sensor for the collision avoidance. Anyone else had similar issues?

Summary of the thread

A 2008 Citroen C4 diesel was experiencing an error message and warning light, suspected to be related to the collision avoidance system's radar sensor. The issue was likely due to a dirty sensor, which can affect other systems. Cleaning the sensor resolved the problem, eliminating the errors.

Did this summary help you solve your problem?

4 comment(s)

maratiger9

Sounds like a faulty or dirty radar sensor. These sensors are quite sensitive. Is the front of the car particularly dirty or have you driven through heavy rain or snow recently? Sometimes a simple clean can sort it out.

christopherrichter23 (community.author)

Yeah, I thought about that. Where exactly is the radar sensor located on the C4? I want to give it a look and see if I can clean it before taking it in.

maratiger9

It's usually behind the front bumper, often near the lower grille. Be careful when cleaning it. Don't use anything abrasive, and avoid high-pressure water. If cleaning doesn't fix it, the sensor might need recalibration or replacement, which is best left to a workshop.

christopherrichter23 (community.author)

Thanks! Turns out you were right, it was just a dirty sensor. Gave it a gentle wipe and all the errors are gone. Cost me 45€ for the cleaning at my friend's workshop. Appreciate the help!

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

C4