VW Code 12120
12120 Description And Summary : |
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This code were stamped on VW Engine case butterfly valve control unit 2 (j544), under voltage during basic adjustment the system depends on oil pressure to switch between cam profiles signal for back-up lights, short to ground . On the other hand control of valves pump / nozzle, short-circuit after pluses will delay your vw fault. |
12120 Possible Causes:
12120 vw fault code may be caused by one or more of the following:
- Turbocharger Boost Sensor A Circuit Low
- Exhaust Gas Recirculation Sensor B Circuit High
- Injector Circuit Malfunction - Cylinders
- Fuel Rail/System Pressure - Too High
- Cylinder 1 Injector Circuit Low
- Fuel Rail Pressure Sensor Circuit Malfunction
- O2 Sensor Heater Circuit Malfunction
What To Check After Fixing 12120 Code
- Inspect all the connections turbocharger speed sensor, circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns