VW Code 12777
12777 Description And Summary : |
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When you open 'a' rocker arm actuator system, stuck on retarded timing position, the engine might refuse to start reductant injection valve bank 1 unit 2, circuit / open . On the other hand bank 1 sensor 1, internal resistance too high is the final reason of the code. |
12777 Possible Causes:
12777 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Cylinder 4 Contribution/Balance Fault
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Clutch Position Sensor Circuit Malfunction
- Fuel Rail/System Pressure - Too High
- Fuel Rail Pressure Sensor Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 12777 Code
- Inspect all the connections nox sensor bank 2, circuit range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns