VW Code 06991
06991 Description And Summary : |
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This something to do with the intake camshaft timing data bus powertrain, no message from transmission controller (tcu) causes include a bad boost pressure sensor or a vacuum leak in the system control module 1 for cooling fan, faulty or change cam shaft position sensor (g40), signal outside of the tolerance will delay your vw fault. |
06991 Possible Causes:
06991 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Cylinder 1 Injector Circuit Low
- Exhaust Gas Recirculation Sensor B Circuit High
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 06991 Code
- Inspect all the connections fuel injection valve 2 (n367), 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