richybear Posted May 19, 2022 Share Posted May 19, 2022 hello i got a 2007 gs450h with 135k miles car was driving perfect untill i parked it at my house using my other cars for couple days on 3rd day i went to go move it car wont start noriced massage check hybrid system car was moving back and forward but i didnt want to take chance so i did diagnose it with my launch scaner and i had code u0100 lost communicatio with ecu when i turn the igniton on the radiator fan screams i replaceed the 12volt batery no change the drive battery has 80 k miles and its 5 years old thank you Quote Link to comment Share on other sites More sharing options...
RX400h Posted May 19, 2022 Share Posted May 19, 2022 This web page contains some general checks after the U0100 code is retrieved. U0100 Code & How To Fix It - PCM Repair - Solo Auto Electronics (solopcms.com) Quote Link to comment Share on other sites More sharing options...
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