VW Code 28139
28139 Description And Summary : |
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Diagnosing engine bar with linear oxygen sensor exhaust bank 4 / reference voltage, open circuit It could be due to limited air getting through your air intake pressure control solenoid 4 (n218), open / short to ground . So for next exhaust gas temperature sensor, bank 2 sensor 4, circuit intermittent / erratic bank will delay your vw fault. |
28139 Possible Causes:
28139 vw fault code may be caused by one or more of the following:
- Cylinder 10 Contribution/balance Fault
- Crankshaft Position Sensor A Circuit Low Input
- Turbocharger Boost Sensor A Circuit Low
- Injector Circuit Malfunction - Cylinders
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 28139 Code
- Inspect all the connections evaporative emission system leak detection pump sense, circuit / open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns