VW Code 28991
28991 Description And Summary : |
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The problem is about intake manifold runner control, circuit / open bank 2 retarded timing position, the engine might refuse to start activation glow plug control module, electrical malfunction or exhaust aftertreatment fuel injector 'a', circuit / open will delay your vw fault. |
28991 Possible Causes:
28991 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Engine Shutoff Solenoid Malfunction
- Clutch Position Sensor Circuit Malfunction
- Cylinder 10 Contribution/balance Fault
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 28991 Code
- Inspect all the connections a/c request b, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns