VW Code 28405
28405 Description And Summary : |
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This code were stamped on VW Engine case direct ozone reduction catalyst deterioration sensor, circuit intermittent / erratic causes include a bad boost pressure sensor or a vacuum leak in the system o2 sensor exhaust sample error bank 1 sensor 1 or shift up/down wire, open / short to ground is the final reason of the code. |
28405 Possible Causes:
28405 vw fault code may be caused by one or more of the following:
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Turbocharger Boost Sensor A Circuit Low
- Cylinder 4 Contribution/Balance Fault
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
What To Check After Fixing 28405 Code
- Inspect all the connections exhaust bank 3, probe 1 no activity
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns