vincentguenther1
Renault Fluence ECU malfunction
Summary of the thread
A 2010 Renault Fluence with a gasoline engine and 50,112 km is experiencing reduced power, with diagnostics indicating a defective engine control unit (ECU). The main relay is suspected to be the cause of the ECU malfunction. Replacing the main relay resolved the issue, restoring the car's performance.
Did this summary help you solve your problem?
4 comment(s)
vincentguenther1 (community.author)
The diagnostics suggest the main relay is the likely culprit, causing the ECU malfunction. Was your issue similar in terms of error codes or symptoms? I'm trying to decide the next steps.
patricia_wolf1
Yeah, similar symptoms, though I didn't do the diagnostics myself. Took it straight to a workshop. They mentioned something about the car's computer throwing errors because of a faulty relay. If your diagnostics already point to the relay and the ECU, I'd suggest getting it checked out professionally. Sounds like you need a new relay, or worse a new ECU.
vincentguenther1 (community.author)
Thanks for the insight. It was indeed the main relay, causing the ECU to act up. Replaced it for 120€, and all seems fine now.
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
RENAULT
community_crosslink_rmh_model
FLUENCE
patricia_wolf1
Hey, I've got a Fluence too (don't remember the year), and I had some weird engine issues. ECU is basically the car's computer, and if it's faulty, it can cause all sorts of problems! Did the diagnostics specify anything about the relay?