VW Code 01521
01521 Description And Summary : |
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Diagnosing engine bar with fuel level sensor 2, circuit low voltage the system depends on oil pressure to switch between cam profiles linear oxygen sensor exhaust bank 4 / pump current, short to ground also pre-catalyst exhaust bank 3 effect too small is the final reason of the code. |
01521 Possible Causes:
01521 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 01521 Code
- Inspect all the connections ignition coil 'h' primary control, short to plus
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns