93 LS400 Engine Temp Indicator at 40%
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Joined: Oct 2014
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From: CA Bay Area
93 LS400 Engine Temp Indicator at 40%
Got my LS400 a few months ago, fantastic car and drives like a dream. One question on the engine temperature indicator maxes out at around 40%, which is right at the indicator mark below 50%. It never moves up beyond that no matter how much I drive. If I drive on the freeway at 60-70Mph, the temperature needle will actually drop down to around 30-35% and when I slow down or stop, the indicator will go back up to 40%.
Does your 90-94LS do the same thing, or should I change the thermostat? I have already changed the Engine Coolant Temp Sensor and it made absolutely no difference.
Thanks in advance for your response!
Does your 90-94LS do the same thing, or should I change the thermostat? I have already changed the Engine Coolant Temp Sensor and it made absolutely no difference.
Thanks in advance for your response!
Last edited by tomgadgets; Mar 4, 2015 at 09:49 AM.
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Sounds normal to me.
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262-456-4147
contact@taninauto.com
www.taninautoelectronix.com
https://taninjdm.com/ Our Lexus LS430 Dealership
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Joined: Jun 2008
Posts: 421
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From: indianapolis
It is not normal, your thermostat is stuck open, i was having exactly the same issue 2 weeks back...
Check your thermostat and replace it if required
My problem solved by replacing the damaged thermostat!
+ Don't buy an aftermarket thermostat !
Normal temp reading would be in the middle which is = 86 Celsius
Check your thermostat and replace it if required
My problem solved by replacing the damaged thermostat!
+ Don't buy an aftermarket thermostat !
Normal temp reading would be in the middle which is = 86 Celsius
Last edited by qewani1; Mar 5, 2015 at 12:47 AM.
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Thread Starter
Driver School Candidate
Joined: Oct 2014
Posts: 36
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From: CA Bay Area
Yes, when driving in the highway, it will drop down to 30% and will move slowly up to the 40% mark if I slow down or stop. Very strange as I never seen this on any of my other cars. Thanks for your input, I am going to bring it to my mechanic and have a more detail look.
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