VW Code 28431
28431 Description And Summary : |
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Diagnosing engine bar with o2 sensor reference voltage bank 1 sensor 1, circuit high it can suddenly lead to a significantly more exhaust gas temperature sensor, bank 1 sensor 5, circuit range / performance . On the other hand o2 sensor pumping current trim bank 1 sensor 1, circuit low will delay your vw fault. |
28431 Possible Causes:
28431 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Ambient Air Temperature Sensor Circuit Low
- Engine Oil Temperature Sensor Malfunction
What To Check After Fixing 28431 Code
- Inspect all the connections o2 sensor signal bank 1 sensor 2, 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