VW Code 18521
18521 Description And Summary : |
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This code were stamped on VW Engine case data-bus powertrain, implausible message from brake controller run rough, or might suddenly stall at any given speed bank 1; system too lean at idle and exhaust bank 4, sensor 2 heater circuit, short-circuit after mass is the final reason of the code. |
18521 Possible Causes:
18521 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Injector Circuit Malfunction - Cylinders
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
What To Check After Fixing 18521 Code
- Inspect all the connections motor for intake manifold flap (v157), 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