P1633 ecm malfunction! Limp mode!
#1
Pole Position
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Join Date: Feb 2010
Location: DFW, TX
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last night, i went to good ole mickie D's during my lunch break, and as i was waiting for my food at the window, the car began to idle very high, must have been 1000-1700 rmps, and the "Trac Off" light started flashing at me, so i get my food i pull over, i'm hitting the throttle and it's like in limp mode, it won't accelerate at all... i read the obdII and it gave me a
p1633 - ECM Malfunction?
so i reset the codes and turned the car off, then on.. and it's driving like normal since last night... i can turn the trac control on and off like normal as well
i just lowered the car, so i thought NOOOO the tires ate threw the wiring harness.. but not yet! lol i'm relocating them 2mrw, picking up a impact gun and compressor 2mrw morning![Thumb Up](https://www.clublexus.com/forums/images/smilies/thumbsup.gif)
anyone know if the ecm really needs to be replaced, because it's driving perfectly fine now... or did it just freak out on me..
thanks in advance.. i looked up the code on this site but couldn't find alot of info
p1633 - ECM Malfunction?
so i reset the codes and turned the car off, then on.. and it's driving like normal since last night... i can turn the trac control on and off like normal as well
i just lowered the car, so i thought NOOOO the tires ate threw the wiring harness.. but not yet! lol i'm relocating them 2mrw, picking up a impact gun and compressor 2mrw morning
![Thumb Up](https://www.clublexus.com/forums/images/smilies/thumbsup.gif)
anyone know if the ecm really needs to be replaced, because it's driving perfectly fine now... or did it just freak out on me..
thanks in advance.. i looked up the code on this site but couldn't find alot of info
#4
Pit Crew
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P1633 is the ETCS system (Throttle control) failing, that would explain why you pressed the throttle and it refused to accelerate. As for what exactly caused it, I can't help you much there, maybe some of the electrical wizards on this site may be able to help you. Maybe visually inspect the ecm to see if maybe you have a leaking cap or somethin'.
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Emil
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