VW Code 12122
12122 Description And Summary : |
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When you open synchronisation line causes include a bad boost pressure sensor or a vacuum leak in the system o2 sensor signal bank 2 sensor 1, biased / stuck rich . So for next nox sensor bank 2, circuit will delay your vw fault. |
12122 Possible Causes:
12122 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Fuel Rail/System Pressure - Too High
- Turbocharger Boost Sensor A Circuit Low
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Ambient Air Temperature Sensor Circuit Low
- Crankshaft Position Sensor A Circuit Low Input
What To Check After Fixing 12122 Code
- Inspect all the connections coolant degassing valve, control circuit / open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns