I am having a problem with my 2003 ES300 . Parked the carin the garage last night, no problem. Cam e out to take my son to school this morning and engine turns over but won't start. I can hear an almost hissing hum under the hood when I put the key in the ignition and it continues until I pull the ke back out. don't remember if I ever heard that before... no DTC codes present.alternator, starter and battery are all brand new, fuses under hood appear all good and there is gas in the tank. Any and all help will be greatly appreciated. thanks in advance...

 

Have you tried giving it a boost?