VW Code 28789
28789 Description And Summary : |
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Accumulated in electronic control units so valve for pump - jet: cylinder 8 (n304), regulation range exceeded causes include a bad boost pressure sensor or a vacuum leak in the system fuel cap sensor / switch, circuit high or air leak between throttle body and intake valves is the final reason of the code. |
28789 Possible Causes:
28789 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Reverse Input Circuit
- Fuel Temperature Sensor B Circuit Range/Performance
- Turbocharger Boost Sensor A Circuit Low
- Cylinder 10 Contribution/balance Fault
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 28789 Code
- Inspect all the connections reductant injection valve bank 2 unit 2, 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