Where to start , help,sos

What’s the (a9) bit mean
Could this be coursing my gear change problems ? 2008 xs
Snorkel
raised axle/gearbox breathers
Mantec tank guard
Cb radio
Blanked EGR
Sump guard
Scratches
Snolkle

This is from the GAP tool manual. Prefix U faults are communication errors.


If faults with a “lost communication with ...” definition are still present and that there are no other
symptoms observed, they can be ignored. These faults are recorded from time to time for no apparent
reason. If faults with the U prefix and unrelated to a communication error are, simply correct the issues
and use the clear fault function.

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User Manual : Version 33, Firmware V3.0