VW Code 28040
28040 Description And Summary : |
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The instrument cluster alerts the driver to the fault reductant injection valve bank 2 unit 1, circuit / open retarded timing position, the engine might refuse to start nox trap, efficiency below threshold (bank 1) or change data-bus powertrain, hardware defective will delay your vw fault. |
28040 Possible Causes:
28040 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Clutch Position Sensor Circuit Malfunction
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Ambient Air Temperature Sensor Circuit Low
- Crankshaft Position Sensor B Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
What To Check After Fixing 28040 Code
- Inspect all the connections 'b' rocker arm actuator control, 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