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Hi again ok you must bring the unit to the dealer so they can scan the TCM for fault codes and to properly trouble shoot.
The purpose of this indicator is to alert the operator
that transmission operation is being inhibited and that range shifts being
requested by the operator may not occur. When certain operating conditions
are detected by the TCM, the controls will command the transmission to be
locked in the range currently in use. If the torque converter clutch is applied
when the condition is detected, the clutch will be disengaged concurrently
with the activation of the RANGE INHIBIT(ED) light.
Each time the engine is started, the RANGE INHIBIT(ED) light will illuminate,
then turn off after two seconds. If the light does not illuminate during ignition,
or if the light remains on after ignition, the transmission system should be
An illuminated RANGE INHIBIT(ED) light indicates the TCM has detected a condition in which directional shifts are
not allowed to be made. This inhibited state can be a self clearing
condition depending on the amount of time the condition is present.
The following conditions may cause an inhibited state:
The transmission control system inhibits shifting to protect the transmission
from some types of abusive operation, in response to Diagnostic Trouble
Codes (DTCs), and to satisfy transmission feature/option requirements.
These shift inhibits fall within the following types:
I went to the vehicle the morning and no range inhibit light on. What found was the check engine flashing and it stop. On dashboard digital display read " ECM128" can you tell what the means? Sorry I didn't get back to you yesterday.
i'm getting software and cabling for the scanner I have, I will get back to you with code.
What codes did you get ?