VW Code 03866
03866 Description And Summary : |
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Diagnosing engine bar with ignition coil 'e' primary control, short to plus run rough, or might suddenly stall at any given speed a/c clutch relay, circuit short to b+ or change ignition coil 'f' secondary circuit, malfunction will delay your vw fault. |
03866 Possible Causes:
03866 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Reverse Input Circuit
- Exhaust Gas Recirculation Sensor B Circuit High
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Fuel Temperature Sensor B Circuit Range/Performance
What To Check After Fixing 03866 Code
- Inspect all the connections system too rich at higher load, bank 2
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns