Low Pressure Fuel System Sensor Circuit
General electrical fault on the low-pressure fuel system sensor — typically the lift-pump or pre-supply pressure sensor that monitors the rail feeding the high-pressure pump. With no valid reading, the ECM cannot verify that lift pressure is sufficient for HP-pump intake.
Affected components
- Lp fuel pressure sensor
- Sensor wiring
Common causes
- High likelihood: Open or shorted wiring to the sensor
- Medium likelihood: Failed sensor element
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
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.