Low Pressure Fuel System Sensor Circuit High
The low-pressure fuel system sensor signal voltage is above the upper limit. Either a short to reference voltage in the signal line, an open signal return, or a sensor reading pegged high after an internal failure. The HP-pump pressure-control strategy falls back to default.
Affected components
- Lp fuel pressure sensor
- Sensor wiring
Common causes
- High likelihood: Signal wire shorted to reference voltage
- Medium likelihood: Open signal return
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.