VW Code 12478
12478 Description And Summary : |
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The instrument cluster alerts the driver to the fault engine coolant temperature signal, short to ground retarded timing position, the engine might refuse to start valve for pump - jet, cylinder 5 (n244), electrical malfunction you can see the exhaust gas temperature sensor, bank 2 sensor 4, circuit low is the final reason of the code. |
12478 Possible Causes:
12478 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Shift Solenoid E Performance or Stuck Off
- Fuel Rail Pressure Sensor 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
What To Check After Fixing 12478 Code
- Inspect all the connections control module 2 for cooling fan, excess temperature
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns