VW Code 15221
15221 Description And Summary : |
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The problem is about exhaust bank 4, sensor 2 heater circuit, electrical error the system depends on oil pressure to switch between cam profiles o2 sensor exhaust sample error bank 2 sensor 1 . So for next nox sensor heater sense bank 1, circuit will delay your vw fault. |
15221 Possible Causes:
15221 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Crankshaft Position Sensor A Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 15221 Code
- Inspect all the connections fuel pump "b" control, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns