hans_taylor8
Laguna Engine Power Loss
4 comment(s)
hans_taylor8 (Author)
Interesting. How did you diagnose the relay? Did your mechanic confirm it before repairs?
nicowolf55
The workshop initially suspected the ECU. But after deeper diagnostics, they found the relay was cutting out intermittently, causing the ECU to behave erratically. I'd recommend a proper diagnostic check – could save you money replacing the ECU unnecessarily. It was only 120€.
hans_taylor8 (Author)
Thank you! I took it to a specialist who confirmed the main relay was defective. Replacing it resolved the issue, and the car is running smoothly again. Much appreciated!
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nicowolf55
Sounds familiar! I have a Laguna too. I had similar symptoms: power loss and error codes. Turned out to be the main relay playing up and messing with the ECU. Check that first!