VW Code 12778
12778 Description And Summary : |
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The problem is about exhaust bank 3/4 lambda probes after kat exchanges the system depends on oil pressure to switch between cam profiles secondary air injection system air flow/pressure sensor bank 2, circuit high or change reductant injection valve bank 1 unit 2, circuit low is the final reason of the code. |
12778 Possible Causes:
12778 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Crankshaft Position Sensor A Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
What To Check After Fixing 12778 Code
- Inspect all the connections turbocharger control module, faulty
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns