VW Code 03504
03504 Description And Summary : |
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Diagnosing engine bar with fuel injection valve 1 (n366), short to b+ causes include a bad boost pressure sensor or a vacuum leak in the system nox trap, efficiency below threshold (bank 1) . So for next load signal stuck on will delay your vw fault. |
03504 Possible Causes:
03504 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- O2 Sensor Heater Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Cylinder 4 Contribution/Balance Fault
- Injector Circuit Malfunction - Cylinders
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Cold Start Injector 1 Malfunction
What To Check After Fixing 03504 Code
- Inspect all the connections nox sensor heater sense bank 1, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns