VW Code 28739
28739 Description And Summary : |
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Diagnosing engine bar with exhaust bank 3 oxygen sensor correction behind catalyst, lean control limit exceeded mechanic will need to check all electrical connections in the camshaft sensor 'a' rocker arm actuator system, stuck on or change o2 sensor exhaust sample error bank 1 sensor 1 will delay your vw fault. |
28739 Possible Causes:
28739 vw fault code may be caused by one or more of the following:
- Fuel Rail/System Pressure - Too High
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Reverse Input Circuit
- O2 Sensor Heater Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 28739 Code
- Inspect all the connections o2 sensor signal bank 1 sensor 3, biased / stuck lean
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns