Alright I was driving in bumper to bumper traffic and then my 01 GS430 Stalled on the freeway.Everything just turn off light I turn the key off. So then I started back up right away the drove for another minute and it did it agian. Kinda got mad now but started back up and it just fired right up no problems but now Check eigine light came on exit the freeway turn on the A/C to keep Idle up.I pulled the codes and got P0100 (MAF malfunction) So I'm like WTF check everything out everything check out okay doesn't stalls anymore Clear the codes.Did any of you guy or tech out there ever came across this problem any information would help. Thanks

 

strange... my 01 GS430 does that as well... hesitates and stumbles when the AC is off... and i got lean running codes... i already replaced my AFM on my car and it still does that...

 

use the search function. This topic has been discussed numerous times.

Quick fix: turn on the AC.

 

but if the AC isn't on, then obviously there's a problem with the car/management system somewhere... stalling is NOT a normal operation...

even with the AC on, my car still gives me a P0172 and my snapshot shows i'm running fairly lean...