OBD-II code · Powertrain (generic, extended)
P23C6 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.
Is it safe to drive with P23C6?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyMotor overloaded by jammed valve
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 1–3.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Coolant Bypass Valve C
Related codes
- P23C3Engine Coolant Bypass Valve C Position Sensor Circuit
- P23C4Engine Coolant Bypass Valve C Position Sensor Circuit Low
- P23C5Engine Coolant Bypass Valve C Position Sensor Circuit High
- P23C7Fuel Heater Control Module Power Control Circuit Open
- P23C8Fuel Heater Control Module Power Control Circuit Low
- P23C9Fuel Heater Control Module Power Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.