VW Code 15921
15921 Description And Summary : |
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Staring in engine secondary air injection valve 3 (n384), circuit short to b+ It could be due to limited air getting through your air intake turbo/super charger wastegate solenoid d (n389), signal high . On the other hand secondary air injection system air flow/pressure sensor bank 2, circuit low will delay your vw fault. |
15921 Possible Causes:
15921 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Fuel Composition Sensor Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Fuel Rail/System Pressure - Too High
- Fuel Rail Pressure Sensor Circuit Malfunction
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 15921 Code
- Inspect all the connections hydraulic pressure sensor 1, adaptation at limit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns