OBD-II code · Powertrain (generic, extended)
P26BE Engine Coolant Bypass Valve D Control Circuit Low
Voltage on the fourth coolant bypass valve control line is below the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P26BE?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to ground
- PossibleInternal short in solenoid coil
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Coolant Bypass Valve D, Solenoid, Wiring Harness
Related codes
- P2682Engine Coolant Bypass Valve A Control Circuit Low
- P26ADEngine Coolant Bypass Valve B Control Circuit Low
- P26B8Engine Coolant Bypass Valve C Control Circuit Low
- P2E63Engine Coolant Bypass Valve E Control Circuit Low
- P26BBEngine Coolant Bypass Valve C Range/Performance
- P26BCEngine Coolant Bypass Valve C Stuck Closed
- P26BDEngine Coolant Bypass Valve D Control Circuit / Open
- P26BFEngine Coolant Bypass Valve D Control Circuit High
- P26C0Engine Coolant Bypass Valve D Stuck/Open
- P26C1Engine Coolant Bypass Valve D Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.