macdaddy4x4 Posted December 17, 2012 Share Posted December 17, 2012 2001 IS300. Just had some service done and my temp guage seems to be running lower than the normal operating range in which it has always run. Justy changed anti-freeze and didn't correct the problem. Is this possibly a thermostat issue or where would I find the engine temp sensor? Quote Link to comment Share on other sites More sharing options...
Steve Posted December 18, 2012 Share Posted December 18, 2012 Hi and Welcome to the Lexus Owners Club Sounds like your thermostat is stuck open, may have something obstructing it or just faulty Quote Link to comment Share on other sites More sharing options...
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