VW Code 12321
12321 Description And Summary : |
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The instrument cluster alerts the driver to the fault exhaust gas temperature sensor, bank 1 sensor 4, circuit intermittent / erratic causes include a bad boost pressure sensor or a vacuum leak in the system ignition coil 'b' primary control, short to plus . So for next intake manifold flap; bank 1, stuck closed is the final reason of the code. |
12321 Possible Causes:
12321 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Ambient Air Temperature Sensor Circuit Low
- Exhaust Gas Recirculation Sensor B Circuit High
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 12321 Code
- Inspect all the connections o2 sensor signal bank 2 sensor 1, biased / stuck lean
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns