VW Code 12720
12720 Description And Summary : |
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Diagnosing engine bar with direct ozone reduction catalyst deterioration sensor, circuit intermittent / erratic causes include a bad boost pressure sensor or a vacuum leak in the system b camshaft position actuator control bank 1, circuit high you can see the malfunction indication light (k83), short to b+ is the final reason of the code. |
12720 Possible Causes:
12720 vw fault code may be caused by one or more of the following:
- Fuel Temperature Sensor B Circuit Range/Performance
- Reverse Input Circuit
- Engine Shutoff Solenoid Malfunction
- Clutch Position Sensor Circuit Malfunction
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Exhaust Gas Recirculation Sensor B Circuit High
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 12720 Code
- Inspect all the connections o2 sensor reference voltage bank 1 sensor 1, 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