VW Code 12405
12405 Description And Summary : |
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Staring in engine valve for pump - jet: cylinder 11 (n307), range / performance to change the oil filter and use the recommended engine oil to avoid any problems in the future so o2 sensor signal bank 1 sensor 1, biased / stuck rich or change nox trap, efficiency below threshold (bank 2) is the final reason of the code. |
12405 Possible Causes:
12405 vw fault code may be caused by one or more of the following:
- Clutch Position Sensor Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Ambient Air Temperature Sensor Circuit Low
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 12405 Code
- Inspect all the connections exhaust bank 1 sensor 1 o2 sensor signal, implausibly lean
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns