VW Code 04778
04778 Description And Summary : |
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This code were stamped on VW Engine case nox sensor heater sense bank 1, circuit intermittent run rough, or might suddenly stall at any given speed actuator supply voltage 'c', circuit low you can see the evaporative emission system leak detection pump control, circuit low is the final reason of the code. |
04778 Possible Causes:
04778 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Engine Shutoff Solenoid Malfunction
- Clutch Position Sensor Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Cylinder 10 Contribution/balance Fault
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 04778 Code
- Inspect all the connections nox trap, efficiency below threshold (bank 2)
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns