My CEL came on about 3 days ago
Car idles very rough and both VSC/ VSC OFF lights are on
I went to autozone and pulled 15 codes

P1349(bank1) P0303 P0305 P0301 P0307 P0300 P0171(bank1) P0150 etc lots of misfires
Ive since changed all 8 spark plugs and i did the P0171 fix (https://www.clublexus.com/forums/gs-...em-solved.html), but the problem still persists
I'm at a loss My last option is going to the dealer

ANY suggestions will help!!!!!!!!!!
thanks in advance

p.s. 1998 GS400 177k

 

Your car most probably didn't pull all those codes. Autozones scanners sometimes mess up, and those are the codes from different cars that they have scanned before you. I know this because this happened to me one time at Autozone. The worker then reset their scanner, and redid it, and all those codes went away.

What most probably happened is this, and the worker must have not known this potential problem.

Either have someone else at Autozone scan it for you, or go to a different Autozone.

 

that could be true, but remember the car is misfireing on all cylinders. That's 8 different codes alone

 

could be your computer throwing false codes. My grandmother was trying to smog her van, but CL light was on. Well after the stealership got her for like $3000+ on a whole top end rebuild (cause the codes were in regards to everything being wrong on top, and just like you car ran fine), my buddy found out it was the ECU! They happened to have one at his shop and he swapped it and the light never came back on (its been about a year and a half now) Find someone with your car and swap ECU's and see what happens.

 

sounds like your variable valve timing solonoid went bad. Same thing happen to me. 100 dollar part and an easy install.

 

Oops, I could have sworn I read that your car ran fine.... so nvm.

 

thanks a lot. where did you buy yours?

 

does anyone know the part number for a gs400 vvt soenoid?
I went to sewell and carson toyota site, but cant find anything
can someone post a link for me

 

Just goto the dealer and ask or call them up on the phone. The VVTi solenoid is a not a common fail part and they usually won't list on their site.

 

thanks man

is bank1 on the driver or passenger side of a GS4?
(last question)

 

I got mine frome the dealership about 2 months ago. Ill look and see if i can find the part number. Its a 5 min install

Btw mine is a 98 gs400 with about the same milage

 

So what was the outcome, Champstar? I have the same codes.

 

I would first get a copy of Lexus service records then perform whatever service is lacking... i.e. tune up, time belt, etc. Next, get a oil change at a local Japanese specialist and ask them to pull the codes. Autozone or Checkers will only get you so far. Your car retailed for 40k plus!

Jack

 

The new solenoid fixed all my CELs 100%
but before swapping it clean the old one as it might just be too dirty to function