VW Code 28890
28890 Description And Summary : |
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The instrument cluster alerts the driver to the fault secondary air injection valve 3 (n384), circuit short to ground run rough, or might suddenly stall at any given speed data bus powertrain, implausible message of the airbag control module you can see the secondary air injection system air flow/pressure sensor bank 1, circuit high is the final reason of the code. |
28890 Possible Causes:
28890 vw fault code may be caused by one or more of the following:
- Timing Reference High Resolution Signal A Too Many Pulses
- Crankshaft Position Sensor B Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 28890 Code
- Inspect all the connections valve for exhaust flap 1 (n321), short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns