VW Code 15521
15521 Description And Summary : |
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Diameter in engine cylinder 2 above knock threshold run rough, or might suddenly stall at any given speed intake manifold runner control, upper stop not reached . On the other hand barometric pressure sensor 'a', circuit range / performance will delay your vw fault. |
15521 Possible Causes:
15521 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- O2 Sensor Heater Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 15521 Code
- Inspect all the connections shift lock, short to b+
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns