OBD-II code · Powertrain (generic, extended)
P26BC Engine Coolant Bypass Valve C Stuck Closed
The third coolant bypass valve is stuck closed.
Is it safe to drive with P26BC?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyValve seized closed by debris
- PossibleActuator linkage jammed in closed position
- Less likelyCarbon or debris buildup preventing free movement
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Coolant Bypass Valve C, Thermostat Housing
Related codes
- P26B1Engine Coolant Bypass Valve A Stuck Closed
- P26B2Engine Coolant Bypass Valve B Stuck Closed
- P26C2Engine Coolant Bypass Valve D Stuck Closed
- P2E67Engine Coolant Bypass Valve E Stuck Closed
- P26B9Engine Coolant Bypass Valve C Control Circuit High
- P26BAEngine Coolant Bypass Valve C Stuck/Open
- P26BBEngine Coolant Bypass Valve C Range/Performance
- P26BDEngine Coolant Bypass Valve D Control Circuit / Open
- P26BEEngine Coolant Bypass Valve D Control Circuit Low
- P26BFEngine Coolant Bypass Valve D Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.