Sounds like "limp" mode, 1st, 2nd and R only.

clear the code, a cheap OBDii scanner won't clear it, and then drain and fill using factory approved fluids. 722.6's are touchy about their fluid type. Will stay in limp mode until the code is cleared. Pulling batt cables or cabin reset won't do anything. Pending what code it is, it may go right back to limp mode until the underlying problem is repaired and it cleared again.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)