GEN1 A/T Temp light on


Active member
I drove about an hour at highhway speeds (~65mph) through some light hills and ambient temps of 85F.

Upon exiting the highway the A/T Temp light came on and I pulled over to let it cool. I took a temp with my IR gun of the transmission pan and it measured 190F which I wouldn’t think to be a problem. I let idle for about 20min and light didn’t come off. I couldn’t find a spot on any of the lines for the AT cooler over 190F.

I think the set point on the light is 260F from manual, so I’m not sure what would be triggering it. Fresh OEM fluid & filter about 5k mi ago, level was ok.

Anyone have any thoughts? I had to shut it off with light on as I was at the racetrack.

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I'm guessing that the FSM has specs to test the sensor - I don't think 190F is high enough to turn the light on so the sensor is most likely your issue.


Active member
Is that the original sensor? Did the light stay off after a restart?
Hey Mark,
The light stayed on after an immediate restart, but did not return after the trans had cooled.
I ordered a replacement sensor through Mitsubishi dealer.

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Likely ur pRobles is solved with the new part.
I believe u bought the last one in existence in North america.
at about 80 dollars? I don't recall exactly. but the dealer told me such was the case, and I declined his offer.
my light burns brightly yet on the dash.

now comes the fun part R&R.
getting to the wee bas***d, and removing it is a lot less fun than a lobotomy.