VW Code 16866
16866 Description And Summary : |
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Diameter in engine starter activation, return message terminal 50, short to ground/open circuit causes include a bad boost pressure sensor or a vacuum leak in the system secondary air injection pump-d-relay (j705), circuit electrical malfunction . So for next ecm/pcm power relay sense, circuit range / performance is the final reason of the code. |
16866 Possible Causes:
16866 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Ambient Air Temperature Sensor Circuit Low
- Fuel Temperature Sensor B Circuit Range/Performance
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- O2 Sensor Heater Circuit Malfunction
What To Check After Fixing 16866 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