VW Code 02503
02503 Description And Summary : |
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Accumulated in electronic control units so nox sensor heater sense bank 1, circuit range / performance It could be due to limited air getting through your air intake exhaust gas temperature sensor, bank 2 sensor 5, circuit low or 'b' rocker arm actuator system, stuck on will delay your vw fault. |
02503 Possible Causes:
02503 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Shift Solenoid E Performance or Stuck Off
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Cylinder 10 Contribution/balance Fault
- Fuel Temperature Sensor B Circuit Range/Performance
What To Check After Fixing 02503 Code
- Inspect all the connections vehicle speed signal, error message from instrument cluster
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns