Code P1165 VOLKSWAGEN
Possible Causes
Potential origins of code P1165 may include:
- Fuel pressure too high (blocked return system or faulty pressure regulator).
- Faulty fuel injector.
- EVAP system purge solenoid stuck in open position.
- Misfire in a cylinder.
- Presence of other error codes to be corrected as a priority.
How to Fix Code P1165?
- Check possible causes:
- Visually inspect the wiring harness and associated connectors for damage, broken, bent, pushed-in, or corroded pins.
- Replace or repair any faulty components detected.
- Perform a thorough diagnosis:
- Check fuel pressure and ensure it is within specified tolerances. If pressure is too high, inspect the regulator or return system.
- Check fuel injectors for leaks or malfunctions.
- Test the EVAP purge solenoid to see if it is stuck in the open position.
- Identify misfires and correct them (spark plugs, coils, or injectors).
- Clear codes and perform a road test:
After correcting the detected issues, clear the error codes using a diagnostic tool and perform a road test to confirm that code P1165 does not reappear.
Possible Symptoms
- Illumination of the check engine light (CEL) or maintenance light.
Meaning of Code P1165 VOLKSWAGEN
Code P1165 indicates that Bank 1 Long Term Fuel Trim Range 1 has exceeded its rich limits. In simple terms, the engine is running with an excessively rich air/fuel mixture, which can lead to increased fuel consumption and higher emissions.
⚠️ Note: Descriptions may vary depending on your vehicle’s model and year. Consult the manufacturer’s manual for specific information.