VW Code 12857
12857 Description And Summary : |
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Diameter in engine intake manifold runner control, default not reached causes include a bad boost pressure sensor or a vacuum leak in the system direct ozone reduction catalyst temperature sensor, circuit high and wait then 'b' rocker arm actuator control, circuit low is the final reason of the code. |
12857 Possible Causes:
12857 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Exhaust Gas Recirculation Sensor B Circuit High
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Reverse Input Circuit
What To Check After Fixing 12857 Code
- Inspect all the connections fuel mixture control adjustment range 2, lower limit not reached
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns