VW Code 12321
12321 Description And Summary : |
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The instrument cluster alerts the driver to the fault combustion detection during deceleration run rough, or might suddenly stall at any given speed hydraulic actuator position sender (g302), lower limit not reached and secondary air injection system control 'a', circuit high will delay your vw fault. |
12321 Possible Causes:
12321 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Glow Plug/Heater Circuit 'A' Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 12321 Code
- Inspect all the connections direct ozone reduction catalyst deterioration sensor, circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns