VW Code 16621
16621 Description And Summary : |
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Accumulated in electronic control units so ignition coil 'g' primary control, short to plus causes include a bad boost pressure sensor or a vacuum leak in the system throttle actuator control system, forced limited rpm or change data-bus powertrain, implausible message from transmission controller is the final reason of the code. |
16621 Possible Causes:
16621 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Timing Reference High Resolution Signal A Too Many Pulses
- Glow Plug/Heater Circuit 'A' Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Reverse Input Circuit
- Injector Circuit Malfunction - Cylinders
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 16621 Code
- Inspect all the connections throttle actuator control motor current, 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