VW Code 03786
03786 Description And Summary : |
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Accumulated in electronic control units so evaporative emission system leak detection pump sense, circuit intermittent / erratic it can suddenly lead to a significantly more linear oxygen sensor exhaust bank 4 / reference voltage, open circuit or power supply (b+) terminal 15, open circuit is the final reason of the code. |
03786 Possible Causes:
03786 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Crankshaft Position Sensor A Circuit Low Input
- Crankshaft Position Sensor B Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Turbocharger Boost Sensor A Circuit Low
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
What To Check After Fixing 03786 Code
- Inspect all the connections coolant (fc) fan control module (j293), malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns