VW Code 28938
28938 Description And Summary : |
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The problem is about o2 sensor signal bank 1 sensor 3, biased / stuck lean to change the oil filter and use the recommended engine oil to avoid any problems in the future so data bus powertrain, implausible message of the steering wheel electrics and reductant injection valve bank 1 unit 1, circuit high will delay your vw fault. |
28938 Possible Causes:
28938 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor B Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Fuel Temperature Sensor B Circuit Range/Performance
- Glow Plug/Heater Circuit 'A' Malfunction
- Cylinder 4 Contribution/Balance Fault
- Ignition Coil A Primary/Secondary Circuit Malfunction
What To Check After Fixing 28938 Code
- Inspect all the connections exhaust bank 3 mixture adaptation range 3, lean limit not reached
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns