VW Code 16821
16821 Description And Summary : |
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The instrument cluster alerts the driver to the fault transmission ratio, implausible It could be due to limited air getting through your air intake exhaust bank 2 sensor 1 oxygen sensor signal, voltage too low during deceleration . On the other hand o2 sensor reference voltage bank 2 sensor 1, circuit / open is the final reason of the code. |
16821 Possible Causes:
16821 vw fault code may be caused by one or more of the following:
- Turbocharger Boost Sensor A Circuit Low
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Cold Start Injector 1 Malfunction
- O2 Sensor Heater Circuit Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 16821 Code
- Inspect all the connections please check dtc memory of adr control module
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns