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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Faulty supply relayCommon
- Wire shorted to groundPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Actuator Supply Relay
- Main Wiring
P2670 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.