OBD-II code · Powertrain (generic, extended)
P26BD Engine Coolant Bypass Valve D Control Circuit / Open
The controller cannot drive the fourth coolant bypass valve.
Is it safe to drive with P26BD?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen coil in bypass valve solenoid
- PossibleBroken control wire
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Coolant Bypass Valve D, Solenoid, Wiring Harness
Related codes
- P2681Engine Coolant Bypass Valve A Control Circuit / Open
- P26ACEngine Coolant Bypass Valve B Control Circuit / Open
- P26B7Engine Coolant Bypass Valve C Control Circuit / Open
- P26BAEngine Coolant Bypass Valve C Stuck/Open
- P26BBEngine Coolant Bypass Valve C Range/Performance
- P26BCEngine Coolant Bypass Valve C Stuck Closed
- P26BEEngine Coolant Bypass Valve D Control Circuit Low
- P26BFEngine Coolant Bypass Valve D Control Circuit High
- P26C0Engine Coolant Bypass Valve D Stuck/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.