Fuel Rail Pressure Sensor Circuit High Input
The ECU reads a voltage from the fuel rail pressure sensor above the calibrated maximum, indicating short to power or open ground reference.
Affected components
- Fuel rail pressure sensor
- Wiring harness
Common causes
- High likelihood: Signal wire shorted to battery
- Medium likelihood: Open ground reference
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
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.