Powertrain
Definition only
Lights the check engine lamp
P2684: Actuator Supply Voltage C Circuit / Open
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P2684 mean?
The third actuator supply rail is open. All loads on this rail are powerless and report follow-on faults.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Blown fuse on the supply rail
- Medium Broken supply wire from main relay
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2684 on the same make and model first.
P2684 in the community
Ask about P2684No one has posted about P2684 yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P2684 problem