Insignia ECU Reduced Power

I'm in a pickle with my 2018 Vauxhall Insignia, gasoline-powered. Only 33094 km on the clock! The engine's throwing a fit reduced power, like it's lost its mojo. And the error memory's screaming at me. A friend hooked it up, and it's pointing towards the ECU being a bit dodgy. Could the main relay be causing this headache?

4 comment(s)

ECU problems on Insignias can be tricky. What sort of diagnostic work have you done so far? Any other weird symptoms besides the power loss and error codes?

Nothing too extensive, to be honest. Just the basic OBD2 scan. The error code points towards the ECU malfunctioning, but is it likely that a defective main relay could genuinely be the culprit?

Yeah, a defective main relay can cause ECU issues, especially with those symptoms. But honestly, without deeper diagnostics, it's hard to say for sure. Best get it to a workshop for a proper check. Could be other things in the control system, vehicle electronics, or even just a bad connection somewhere.

Cheers for the advice! Took it to the shop. Turns out you were spot on faulty main relay messing with the ECU. Repair cost me about 120€. Runs like a dream now!

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