Today a strange thing happens.
I turn the key and nothing happens and on the dash a message " Trans failsafe & prog". Reason? Solution?

First thing to check is battery voltage.... Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

The battery is very good

That's a shame, it's the usual suspect, I'm not familiar with that box so can't help, you may get more replies if you edit your first post and make the title more relevant to the issue... Good Luck...  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

It is possible that you have a fault with the transfer box shift motor, not 100% definite, but may be worth checking with a gearbox specialist. Found some interesting reading in the below links, at least the gearbox itself could well be ok apart from needing an oil / filter change if it has not had one yet.

https://www.lrukforums.com/threads/trans-failsafe-prog.123621/

https://axleaddict.com/auto-repair/What-Is-Trans-Failsafe



Hope this helps line up some beers for a long read