VW Code 28490
28490 Description And Summary : |
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Diagnosing engine bar with supply voltage for fuel injector group a, short to b+ it can suddenly lead to a significantly more exhaust bank 4 sensor 1 heater circuit, electrical malfunction . On the other hand exhaust bank 4, sensor 1, heater circuit achievement too small will delay your vw fault. |
28490 Possible Causes:
28490 vw fault code may be caused by one or more of the following:
- Ambient Air Temperature Sensor Circuit Low
- Injector Circuit Malfunction - Cylinders
- Reverse Input Circuit
- Exhaust Gas Recirculation Sensor B Circuit High
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 28490 Code
- Inspect all the connections o2 sensor reference voltage bank 1 sensor 1, 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