OBD-II code · Powertrain (generic, extended)
P2682 Engine Coolant Bypass Valve A Control Circuit Low
Voltage on the coolant bypass valve A 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 P2682?
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 A, Solenoid, Wiring Harness
Related codes
- P26ADEngine Coolant Bypass Valve B Control Circuit Low
- P26B8Engine Coolant Bypass Valve C Control Circuit Low
- P26BEEngine Coolant Bypass Valve D Control Circuit Low
- P2E63Engine Coolant Bypass Valve E Control Circuit Low
- P267FControl Module Internal Temperature Sensor A Circuit Intermittent/Erratic
- P2680Coolant Degassing Valve Control Circuit High
- P2681Engine Coolant Bypass Valve A Control Circuit / Open
- P2683Engine Coolant Bypass Valve A Control Circuit High
- P2684Actuator Supply Voltage C Circuit / Open
- P2685Actuator Supply Voltage C Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.