Possible Causes
- Faulty fuel rail pressure sensor
- Damaged fuel rail pressure sensor wiring (or short circuit)
- Poor electrical connection of the fuel rail pressure sensor
How to Fix Code P1169?
- Check the possible causes mentioned above.
- Visually inspect the wiring harness and associated connectors.
- Look for visible damage: cut wires, broken, bent, corroded, or poorly secured connector pins.
- Test the fuel rail pressure sensor to ensure it is functioning properly.
- Check the fuel pressure using a diagnostic tool to see if it is within the recommended values.
Possible Symptoms
- Illumination of the engine light (or maintenance light).
Meaning of Code P1169
The Complete Component Monitor (CCM) monitors the fuel rail pressure (FRP) to ensure it remains within an acceptable range. The Engine Control Module (ECM) detects fuel pressure that is too high compared to the expected operating conditions. The test fails when the fuel pressure exceeds or falls below a calibrated value for a specified period.