VW Code 18991
18991 Description And Summary : |
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When you open injector cylinder 14 (n391), circuit high it can suddenly lead to a significantly more ignition coil 'a' primary control, short to plus and wait then pressure control valve 4 (n218), short to plus is the final reason of the code. |
18991 Possible Causes:
18991 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Ambient Air Temperature Sensor Circuit Low
- Turbocharger Boost Sensor A Circuit Low
- Crankshaft Position Sensor B Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Cylinder 4 Contribution/Balance Fault
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
What To Check After Fixing 18991 Code
- Inspect all the connections angle sensors 1 for butterfly valve drive 2 (g297), signal too largely
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns