Lexus LFA ECU Error Codes

My 2011 Lexus LFA with a gasoline engine is throwing codes and performance is suffering. Mileage is 69659 km. Getting reduced engine power, and the ECU's storing error codes. I suspect a defective engine control unit. Has anyone else seen this?

4 comment(s)

Could be a few things, but first check your main relay. Is the car cranking okay? Any issues with other electrical systems?

Cranking is fine, and all other systems seem normal. Where is that relay located? Is there any chance it is a grounding issue somewhere?

The relay is usually in the engine bay fuse box. A bad relay can definitely cause ECU issues. Failing that, have the unit checked at a workshop. See if you can get away with just a system reset. Good luck.

Thanks. Checked the main relay as suggested - appears that was the source. Replaced it, cleared the codes, and power is back. Total outlay 120€. Appreciate the help.

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