Engine Coolant Bypass Valve C Control Circuit Driver Current or Temperature Too High
The driver stage of the coolant bypass valve C reports excessive current draw or thermal protection trip - typically a sticking valve drawing too much motor current.
Affected components
- Coolant bypass valve c
Common causes
- High likelihood: Motor overloaded by jammed valve
Possible symptoms
- Check engine light on
- Cooling fan runs constantly or not at all
- Cabin heater weak or excessively hot
- Possible long warm-up time or hard cold start
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.