Fuel Volume Regulator A Control Circuit/Open
The ECU detects an open circuit in the control of fuel volume regulator A (often the metering valve on the high-pressure fuel pump). The actuator does not respond, so rail pressure cannot be controlled accurately.
Affected components
- Fuel volume regulator
- High pressure fuel pump
- Fvr wiring
- Fvr connector
Common causes
- High likelihood: Wiring break or unplugged connector
- Medium likelihood: Regulator solenoid coil open
- Low likelihood: ECU output driver failed
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
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.