makaister Posted August 16, 2012 Share Posted August 16, 2012 Hello everyone! i just bought a 2008 lexus rx400h Blk/blk with dark wood trim! such a clean look and smooth quiet ride, i am impressed! however.... i picked the car up this past saturday and then brought it back to the non-lexus dealer sunday night so they can repaint the bumper, replace pads&rotors and new tires... when i drove LEX on saturday i had no issues it was as quiet as a mouse! but after picking it up yesterday and driving 10 miles i heard a beep and two warning lights came on.. One light is tire pressure and the other is the master warning "!" and the display says "check system"... my tank was nearly empty and the troubleshooting said to add fuel and check tire pressure.. i added fuel and found that each tire had 40PSI.. the manual and the sticker on the door recommend 30PSI... is the PSI the issue? should i decrease each tire to 30PSI? I also noticed a near silent wisper of the electric motor when i acclerated and braked. my first thoughts are that its just the electric motor but i dont remember hearing anything on saturday.. please help!! i love this car and would rather figure this out on my own rather than dropping it off at the dealer for another 3-4 days.. Quote Link to comment Share on other sites More sharing options...
lenore Posted August 16, 2012 Share Posted August 16, 2012 Check tire pressure on your spare also....There is a reset procedure in the owners manual... Quote Link to comment Share on other sites More sharing options...
makaister Posted August 16, 2012 Author Share Posted August 16, 2012 Check tire pressure on your spare also.... what would the spare have to do with the warning lights? Quote Link to comment Share on other sites More sharing options...
BobBass Posted August 16, 2012 Share Posted August 16, 2012 The spare tire has an active sensor as well. Quote Link to comment Share on other sites More sharing options...
lenore Posted August 16, 2012 Share Posted August 16, 2012 If the spare and the other tires dont match within a certain percentage the lamp will light. Quote Link to comment Share on other sites More sharing options...
makaister Posted August 16, 2012 Author Share Posted August 16, 2012 thanks for the update! gotta love lexus technology! Quote Link to comment Share on other sites More sharing options...
makaister Posted August 17, 2012 Author Share Posted August 17, 2012 took it to the dealer and sure enough it was the spare.. they also mentioned if the PSI if off by 3 between tires it will trigger the indicator. my blk on blk is riding nice again! Quote Link to comment Share on other sites More sharing options...
RX400h Posted August 17, 2012 Share Posted August 17, 2012 I try to keep tire pressure at 33-35 psi.Your results may vary, depending upon your tire selection. Quote Link to comment Share on other sites More sharing options...
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