Code result
P2686
Actuator Supply Voltage C Circuit High
Moderate severity
What it means
The third actuator supply rail is above the expected voltage. Likely a charging system overvoltage or a short to a higher-voltage source.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Alternator regulator failure
mediumA plausible cause — test and verify before replacing parts.
Wiring shorted to a higher-voltage circuit
lowLess common, but worth ruling out after the more likely causes.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2686 freeNo credit card required