CHR Engine Control Unit Failure

My 2020 Toyota CHR with a gasoline engine is having issues. At 124652 km, it feels like the engine control unit is failing. Engine power is down, and there are error codes. Could this be a bigger system problem?

4 comment(s)

Sounds familiar! Had similar stuff happen with my old Opel Astra, though it was the diesel version. Did you check the main relay? Apparently, a defective relay can mess with the ECU big time.

Could you elaborate on how a defective main relay affects the engine control unit? Were your symptoms similar?

Well, with my Astra it kinda cut power intermittently and threw a bunch of weird codes. I'm no expert, but the main relay failing seems to screw with the voltage to the ECU. Best bet is probably a workshop, they can check it properly.

Thanks for the help. I went to a technician, and they confirmed it was a defective main relay. Replacing it for 120€ fixed the problem. Thanks again!

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