VW Code 03728
03728 Description And Summary : |
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When you open nox trap, efficiency below threshold (bank 2) It could be due to limited air getting through your air intake secondary air injection pump-d-relay (j705), circuit open circuit . On the other hand transmission control unit, incorrect coded is the final reason of the code. |
03728 Possible Causes:
03728 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 03728 Code
- Inspect all the connections ignition coil 'd' secondary circuit, malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns