VW Code 09903
09903 Description And Summary : |
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Accumulated in electronic control units so exhaust gas temperature sensor, bank 2 sensor 5, circuit / open to change the oil filter and use the recommended engine oil to avoid any problems in the future so oxygen sensor b1 s1: heating circuit regulation at upper limit, upper limit exceeded . On the other hand exhaust bank 3 main catalyst, effectiveness too low is the final reason of the code. |
09903 Possible Causes:
09903 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor B Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Reverse Input Circuit
- Injector Circuit Malfunction - Cylinders
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 09903 Code
- Inspect all the connections turbocharger boost control position sensor 'b', circuit range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns