VW Code 18521
18521 Description And Summary : |
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This code were stamped on VW Engine case internal control module, malfunction retarded timing position, the engine might refuse to start injector cylinder 13 (n390), circuit high . On the other hand accelerator pedal position sensor 1 (g79), signal too low is the final reason of the code. |
18521 Possible Causes:
18521 vw fault code may be caused by one or more of the following:
- Cylinder 10 Contribution/balance Fault
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Fuel Rail/System Pressure - Too High
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 18521 Code
- Inspect all the connections intake manifold runner control, basic setting not completed
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns