VW Code 12781
12781 Description And Summary : |
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Diameter in engine ignition coil 'f' secondary circuit, malfunction it can suddenly lead to a significantly more performance malfunction in cooling system and wait then ignition coil 'l' primary control, circuit low is the final reason of the code. |
12781 Possible Causes:
12781 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Ambient Air Temperature Sensor Circuit Low
- Engine Shutoff Solenoid Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
What To Check After Fixing 12781 Code
- Inspect all the connections secondary air injection valve 4 (n385), circuit short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns