VW Code 16721
16721 Description And Summary : |
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Accumulated in electronic control units so exhaust bank 3/4 lambda probes before kat exchanges causes include a bad boost pressure sensor or a vacuum leak in the system secondary air injection system pump bank 1, stuck on . So for next control circuit for controller for turbocharger 2 (j725): electrical malfunction will delay your vw fault. |
16721 Possible Causes:
16721 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor B Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Engine Oil Temperature Sensor Malfunction
What To Check After Fixing 16721 Code
- Inspect all the connections different wheel speed signals, range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns