Automatic transmission mitsubishi io

Hello greetings to all I have a Mitsubishi Montero Io of 2000 Automatic transmission
in the cold start it works well but when it heats and reaches normal temperature the light of N begins to flash being the car in D, I turn it off and I turn it on and it works normally again and after a while it fails again if someone has had any problem help me and illuminate me .... Greetings to all.

Hello . That the light n blinks means that it is in failure proof mode ... that is, the box controller detects a malfunction in some of its main control circuits. The ideal would be scanar ... but something very similar happened to me and turned out to be the internal wiring of the box ... in the carter. Time and heat are relentless with those circuits exposed to hot ATF. When they begin to fail there are times what you describe ... then when the temperature rises the wiring is dilated and cut .... I also recommend scaling it to identify the failure (s) with failure. Greetings.