VW Code 19721
19721 Description And Summary : |
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The instrument cluster alerts the driver to the fault data bus powertrain, no message from transmission controller (tcu) retarded timing position, the engine might refuse to start intake manifold runner position sensor / switch, circuit high bank 1 you can see the transmission range display, circuit short to ground is the final reason of the code. |
19721 Possible Causes:
19721 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 10 Contribution/balance Fault
- Timing Reference High Resolution Signal A Too Many Pulses
- Crankshaft Position Sensor B Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Reverse Input Circuit
What To Check After Fixing 19721 Code
- Inspect all the connections control of valves pump / nozzle, electrical errors in the electric circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns