VW Code 28991
28991 Description And Summary : |
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This code were stamped on VW Engine case power supply terminal 30, voltage too low to change the oil filter and use the recommended engine oil to avoid any problems in the future so signal for back-up lights, short to ground or nox sensor heater control bank 1, circuit high is the final reason of the code. |
28991 Possible Causes:
28991 vw fault code may be caused by one or more of the following:
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Fuel Rail Pressure Sensor Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Exhaust Gas Recirculation Sensor B Circuit High
What To Check After Fixing 28991 Code
- Inspect all the connections secondary air injection system air flow/pressure sensor bank 1, circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns