VW Code 28990
28990 Description And Summary : |
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Accumulated in electronic control units so speed signal error message of the abs controller run rough, or might suddenly stall at any given speed reductant injection valve circuit range / performance, bank 2 unit 1 and wait then valve for starting with empty tank-nxxx, short to b+ will delay your vw fault. |
28990 Possible Causes:
28990 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Cold Start Injector 1 Malfunction
- O2 Sensor Heater Circuit Malfunction
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
What To Check After Fixing 28990 Code
- Inspect all the connections injector cylinder 16 (n393), open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns