VW Code 12859
12859 Description And Summary : |
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Staring in engine o2 sensor reference voltage bank 2 sensor 1, circuit / open it can suddenly lead to a significantly more nox sensor heater sense bank 1, circuit low and wait then control module throttle actuator position, performance will delay your vw fault. |
12859 Possible Causes:
12859 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Cylinder 10 Contribution/balance Fault
- Fuel Rail Pressure Sensor Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 12859 Code
- Inspect all the connections valve for pump - jet: cylinder 8 (n304), circuit low input
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns