VW Code 17991
17991 Description And Summary : |
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Diameter in engine o2 sensor negative current control bank 2 sensor 1, circuit / open retarded timing position, the engine might refuse to start exhaust gas recirculation cooling valve control, circuit / open or change data bus powertrain, implausible message from control module battery monitoring will delay your vw fault. |
17991 Possible Causes:
17991 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Injector Circuit Malfunction - Cylinders
- Cylinder 4 Contribution/Balance Fault
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
What To Check After Fixing 17991 Code
- Inspect all the connections clutch pressure, adaptation at limit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns