VW Code 03503
03503 Description And Summary : |
|---|
When you open throttle/pedal position sensor 'b', minimum stop performance retarded timing position, the engine might refuse to start fuel pressure regulator 2 control circuit / open or nox sensor heater sense bank 2, circuit intermittent will delay your vw fault. |
03503 Possible Causes:
03503 vw fault code may be caused by one or more of the following:
- Cylinder 4 Contribution/Balance Fault
- O2 Sensor Heater Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Ambient Air Temperature Sensor Circuit Low
- Fuel Rail/System Pressure - Too High
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 03503 Code
- Inspect all the connections o2 sensor out of range during deceleration bank 1 sensor 1
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns