OBD-II code · Powertrain (generic, extended)
P2684 Actuator Supply Voltage C Circuit / Open
The third actuator supply rail is open. All loads on this rail are powerless and report follow-on faults.
Is it safe to drive with P2684?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBlown fuse on the supply rail
- PossibleBroken supply wire from main relay
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Actuator Supply C, Control Module, Wiring Harness
Related codes
- P2669Actuator Supply Voltage B Circuit / Open
- P26E7Actuator Supply Voltage D Circuit / Open
- P2681Engine Coolant Bypass Valve A Control Circuit / Open
- P2682Engine Coolant Bypass Valve A Control Circuit Low
- P2683Engine Coolant Bypass Valve A Control Circuit High
- P2685Actuator Supply Voltage C Circuit Low
- P2686Actuator Supply Voltage C Circuit High
- P2687Fuel Supply Heater Control Circuit / Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.