Lexus RC Speed Signal Malfunction

I had similar symptoms with my RC. Have you checked the wheel speed sensors? It might be a faulty sensor input causing the ECM to throw errors. The ABS, traction control, and speedometer all use those signals.

Thanks. I haven't checked the wheel speed sensors individually. When you had this, did the ABS fail completely, and did you have to replace the control unit?

Yes, the ABS was completely disabled. The control unit was the problem. Replacing it, with labor, cost around 1000€. I'd suggest a qualified workshop to confirm, but it sounds like the same issue.

Thank you. I appreciate your help and will bring it to a qualified workshop for diagnosis and repair. The estimated repair cost seems right based on the probable defective control unit.