VW Code 15403
15403 Description And Summary : |
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Diameter in engine secondary air injection valve 4 (n385), circuit short to b+ retarded timing position, the engine might refuse to start reversing light, circuit open . On the other hand cylinder 12 above knock threshold will delay your vw fault. |
15403 Possible Causes:
15403 vw fault code may be caused by one or more of the following:
- Fuel Rail/System Pressure - Too High
- Cylinder 4 Contribution/Balance Fault
- Shift Solenoid E Performance or Stuck Off
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 15403 Code
- Inspect all the connections injector cylinder 14 (n392), open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns