SM5 Bypass Valve Error

Interesting issue! Overheating and a bypass valve error on a Renault SM5... While a blocked exhaust could theoretically contribute, it's less likely to directly trigger a bypass valve error. Is the car experiencing any noticeable power loss, and does the error code give any specific details about the bypass valve malfunction? It may be a consequential error resulting from another error.

Thanks for the quick reply! Yes, there is a definite power loss when accelerating. The error code is pretty generic, just indicating a malfunction in the bypass valve circuit. What kind of other error could possibly trigger this?

Okay, power loss and a generic bypass valve error code, plus overheating on your SM5... Hmmm. Given the symptoms, my suspicion is still a faulty sensor somewhere in the intake or cooling system reporting incorrect data. The bypass valve error might be a red herring that does not require the valve to be replaced. However, with a generic error, it's honestly tough to diagnose remotely. A workshop visit may be unavoidable for deeper diagnostics.

Thanks for the detailed feedback! You were spot on. Turns out it was a bad temperature sensor causing all sorts of chaos, including the bypass valve error. Got it sorted, and the total repair cost was 0€!