VW Code 12921
12921 Description And Summary : |
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The instrument cluster alerts the driver to the fault supply voltage for fuel injector group a, short to ground to change the oil filter and use the recommended engine oil to avoid any problems in the future so oxygen sensor b1 s1: heating circuit regulation at upper limit, upper limit exceeded or change friction too high, exhaust cam adjustment bank 2 is the final reason of the code. |
12921 Possible Causes:
12921 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Crankshaft Position Sensor A Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Injector Circuit Malfunction - Cylinders
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 12921 Code
- Inspect all the connections reductant injection valve bank 1 unit 2, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns