VW Code 16421
16421 Description And Summary : |
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Diameter in engine data bus powertrain, implausible message of the control module central electrics run rough, or might suddenly stall at any given speed oxygen sensor b1 s1: heating circuit regulation at upper limit, upper limit exceeded . So for next controller pin coding, implausible signal is the final reason of the code. |
16421 Possible Causes:
16421 vw fault code may be caused by one or more of the following:
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Fuel Temperature Sensor B Circuit Range/Performance
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 16421 Code
- Inspect all the connections relays for small amount of heat (j359), short-circuit after pluses
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns