Actuator Supply Voltage A Circuit Open
The supply rail that powers a group of actuators (typically injectors, EGR, throttle motor) is open. Multiple downstream actuators stop working.
Affected components
- Actuator supply voltage a
- Actuator supply relay a
Common causes
- High likelihood: Supply relay open
- Low likelihood: Pin pushed back out of connector body
- Low likelihood: Cracked solder joint inside the module or sensor
Possible symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.