OBD-II code · Powertrain (generic, extended)
P26B2 Engine Coolant Bypass Valve B Stuck Closed
The second coolant bypass valve is stuck closed.
Is it safe to drive with P26B2?
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
- Likely to fail
- Parts involved
- Coolant Bypass Valve B, Thermostat Housing
Related codes
- P26B1Engine Coolant Bypass Valve A Stuck Closed
- P26BCEngine Coolant Bypass Valve C Stuck Closed
- P26C2Engine Coolant Bypass Valve D Stuck Closed
- P2E67Engine Coolant Bypass Valve E Stuck Closed
- P26AFEngine Coolant Bypass Valve B Stuck/Open
- P26B0Engine Coolant Bypass Valve B Range/Performance
- P26B3Fuel Shutoff Valve A Control Circuit Performance/Stuck Off
- P26B4Fuel Shutoff Valve A Control Circuit Stuck On
- P26B5Fuel Shutoff Valve B Control Circuit Performance/Stuck Off
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.