VW Code 03966
03966 Description And Summary : |
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Diagnosing engine bar with linear oxygen sensor exhaust bank 4 / pump current, open circuit run rough, or might suddenly stall at any given speed mass-airflow sensor 4 (g457), signal to high and wait then shift lock, short to b+ will delay your vw fault. |
03966 Possible Causes:
03966 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- Engine Oil Temperature Sensor Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Cylinder 4 Contribution/Balance Fault
- Injector Circuit Malfunction - Cylinders
- Exhaust Gas Recirculation Sensor B Circuit High
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 03966 Code
- Inspect all the connections reversing light, circuit short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns