AT OIL TEMP ISSUE: LX470
I just purchased a very clean 2005 LX470 from the Lexus dealer in Henderson NV. 105k miles, 1 owner, seems to drive great. I was very excited …. However, there’s an ongoing issue with the AT oil temp.
Backstory:
I flew to Vegas to purchase. On my first attempt to drive this home to CA from the dealer, the AT oil temp light came on for me. I was only 30 minutes away from the dealer and I drove it back.
The dealer kept the LX for a few days to test and they said they accidentally overfilled it when doing a flush and corrected the issue.
I flew back to to dealer, test drove it again, and it worked fine. I proceeded to head home again. 30 miles outside of the dealer and in traffic the AT oil temp light went on again. The dealer was closing for the day and so I went and bought laser scanner temp gun and an obd2 scanner.
In Vegas, flat ground, traffic and 100 degrees weather: AT oil temp got up to ~280-300. Again, this was within an hour after I purchased the car. The OBD2 code was: P0712 “transmission fluid temperature sensor “a” Circuit Low Input”.
I spend the night in Vegas and the dealer inspected the transmission the next day. Oil was not burned, there was only a normal amount of metal in the pan/filter and everything looked fine”. They did admit that the first two times they changed the transmission fluid, no one on their team changed the filter though. They refilled it, changed the filter, tested it themselves and sent me on my way.
I headed home for the third attempt. It only took an hour of driving and the first big hill for the AT oil temp light to go off again. After that first hill leaving Vegas, I let it cool down and continued the drive home once it was safe. It drove fine the rest of the way.
Side note: Unfortunately I also noticed that the dealer had also turned on the heat during their test drive which probably gave them faulty info during the test (this is concerning if it was intentional to keep it running cooler). I was told that during their last test which was going up a long hill when it was hot out they were around 275 degrees using the live data on their obd2 scanner.
Current details:
Testing back home in CA. I drove partially up a local Mountian and the AT oil temp light came on again. It was 70 degree weather. AT oil temp was 287 - 302 range with light on. And cooled to 238-251 20 mins later once light turned off after resting with engine off 1/2 way up the Mountian.
At home after driving back 1.5 hrs it’s 251-261 in the cool night air.
The light doesn’t come on for normal daily driving, but as soon as something pushes it (traffic and hot weather or go if up a steep long hill) it seems to get to 300 degrees every time.
It drives amazing, shifts perfectly as well. I’m at a loss for what to do here.
Anyone can law ever had this experience before?
I love the truck, it’s supposed to be for adventures. But at this point I can’t even make it to the top of a long steep hill without an AT oil temp issue.
Any help is so greatly appreciated. Thanks so much .
I just purchased a very clean 2005 LX470 from the Lexus dealer in Henderson NV. 105k miles, 1 owner, seems to drive great. I was very excited …. However, there’s an ongoing issue with the AT oil temp.
Backstory:
I flew to Vegas to purchase. On my first attempt to drive this home to CA from the dealer, the AT oil temp light came on for me. I was only 30 minutes away from the dealer and I drove it back.
The dealer kept the LX for a few days to test and they said they accidentally overfilled it when doing a flush and corrected the issue.
I flew back to to dealer, test drove it again, and it worked fine. I proceeded to head home again. 30 miles outside of the dealer and in traffic the AT oil temp light went on again. The dealer was closing for the day and so I went and bought laser scanner temp gun and an obd2 scanner.
In Vegas, flat ground, traffic and 100 degrees weather: AT oil temp got up to ~280-300. Again, this was within an hour after I purchased the car. The OBD2 code was: P0712 “transmission fluid temperature sensor “a” Circuit Low Input”.
I spend the night in Vegas and the dealer inspected the transmission the next day. Oil was not burned, there was only a normal amount of metal in the pan/filter and everything looked fine”. They did admit that the first two times they changed the transmission fluid, no one on their team changed the filter though. They refilled it, changed the filter, tested it themselves and sent me on my way.
I headed home for the third attempt. It only took an hour of driving and the first big hill for the AT oil temp light to go off again. After that first hill leaving Vegas, I let it cool down and continued the drive home once it was safe. It drove fine the rest of the way.
Side note: Unfortunately I also noticed that the dealer had also turned on the heat during their test drive which probably gave them faulty info during the test (this is concerning if it was intentional to keep it running cooler). I was told that during their last test which was going up a long hill when it was hot out they were around 275 degrees using the live data on their obd2 scanner.
Current details:
Testing back home in CA. I drove partially up a local Mountian and the AT oil temp light came on again. It was 70 degree weather. AT oil temp was 287 - 302 range with light on. And cooled to 238-251 20 mins later once light turned off after resting with engine off 1/2 way up the Mountian.
At home after driving back 1.5 hrs it’s 251-261 in the cool night air.
The light doesn’t come on for normal daily driving, but as soon as something pushes it (traffic and hot weather or go if up a steep long hill) it seems to get to 300 degrees every time.
It drives amazing, shifts perfectly as well. I’m at a loss for what to do here.
Anyone can law ever had this experience before?
I love the truck, it’s supposed to be for adventures. But at this point I can’t even make it to the top of a long steep hill without an AT oil temp issue.
Any help is so greatly appreciated. Thanks so much .