Hello.. I am still waiting I hope to get a answer by tomorrow.. nobody answered the other guy asking about this code and another one .. If someone else doesnt get you the answer I will get back to you..thanks for your patience
I finally got it!!!
Engine control unit monitor
engine control unit does not match display monitor engine configuration ( sucurity violation)
Best I can tell is the config settings have been changed on one or the other about the other one.. did you have any work done recently?? this is going to be a dealer repair, or someone who can plug a lap top into it with Deere service software to change the configs.. you say its only got 900 hrs.. check on the warrantee.. the machine operation should not be affected.. sorry took so long hope it helps..