OBD-II code · Powertrain (generic, extended)
P2670 Actuator Supply Voltage B Circuit Low
The supply voltage to actuator group B (e.g. solenoids, valves driven by ECU) is below the calibrated threshold. The affected actuators may be slow or unable to switch.
Is it safe to drive with P2670?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyFaulty supply relay
- PossibleWire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Actuator Supply Relay, Main Wiring
Related codes
- P0658Actuator Supply Voltage A Circuit Low
- P2685Actuator Supply Voltage C Circuit Low
- P26E8Actuator Supply Voltage D Circuit Low
- P266DA Rocker Arm Actuator Position Sensor Circuit High Bank 2
- P266EA Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 2
- P266FA/C Refrigerant Distribution Valve A Control Circuit Driver Current/Temperature Too High
- P2671Actuator Supply Voltage B Circuit High
- P2672Injection Pump Timing Offset
- P2673Injection Pump Timing Calibration Not Learned
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.