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.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Blown fuse on the supply railCommon
- Broken supply wire from main relayPossible
Parts involved
- Actuator Supply C
- Control Module
- Wiring Harness
P2684 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.