kit cat

iTrader: (6)

After going through pages after pages of this thread and taking notes on what parts I need and trying to understand the difference between APP and TPS and the differential diagnosis you guys are posting, this is a relief...

About this Customer Support Program, does anyone know if P1125 (TPS) and P1126 (magnetic clutch) would be covered by this program? I'd think these two codes fall under the covered parts of (iii) accelerator pedal assembly or (v) throttle body assembly...

Mcon

iTrader: (1)

Thanks for this info.. Today I go to the lexus dealer to see what in the services department say to me about it. Thanks again .

wbmx1981

Today I got the 1126 code, the throttle body issue. I could not move the vehicle without it stalling. Thank God, I knew about the "Toyota Economic Loss Settlement" and I've read about other members getting it fixed for free of charge by the dealer. I called Lexus customer care and was referred to the law offices of the attorneys that are handling the law suit. Lexus of Austin service dept. advised that if the part is the throttle body, then it would fall under the settlement and would be covered.

corkycal

iTrader: (8)

I'm no expert but perhaps your brake master is defective. If you're hearing the buzzing noise, it coming from the BMC. When my car went into limp mode, the check engine light came on, P1120.

It can be a combo problem where your TB and BMC will need replacement.

burny

undo the harness on the TCM and check resistance with a multimeter. There is a PDF file buried in this thread that has the resistance limits listed.

wbmx1981

Update: My issue was my MAF sensor. I was using a $70 Dorman from Rockauto (never using Dorman again as it was only one year old). If you unplug the MAF sensor it will put the car in "Safe Mode" which will allow further diagnosis of other parts and my throttle body was good after all. When the MAF was connected the car shut off, but when it was unplugged it ran good. I replaced the Dorman MAF with an OEM one from Lexus ($300) one and now the vehicle is back to running silky smooth.

kit cat

iTrader: (6)

Update - Just got this done by the dealership. Labor and parts were covered by this Customer Support Program. I'll post more details later.

ronald1967

I have a 99 gs400 when driving from 0 to 20 my car has a real bad jerk I took it to a transmission shop thinking i needed to change my transmisson screen they did a diagnostic and found nothing wrong they said it has something to do with my acceleration sensor can anyone give me a solution on what I need to fix this problem.

kit cat

iTrader: (6)

if it's the acceleration position sensor or throttle position sensor, it should throw a check engine light. Go to autozone, have the code read, confirm.

poloSTL

i just confirmed i'm eligible with Lexus cust care. I have exact same issues but have not scanned for codes??? Can i just go to dealership and they can run codes and get work completed??

can't believe i'm getting this done for free

poloSTL

update...

got scan done and codes P1120 and P1121

WHICH INDICATES accelerator position sensor circuits

So going to go to Lexus Dealer Monday to get fixed!

Thank god i came back to this great forum to find out about the Toyota Settlement.

Everyone here have a great weekend!

LeadGS300

Thanks for sharing.
How did you confirm eligibility?
Also, did you get the repair done, and did it fix the issue?

TonyPHL

Hi all, I wanted to add my story as a way to say thanks to the people on this thread for all the great info.

A few months ago I bought a 2000 300GS with a 180K miles on it. I wanted a reliable car for city driving. At first everything was fine, but after a couple of weeks of normal use... Check Engine light went on, followed within a day by the dreaded VSC lights and limp mode.

I thought "Oh great here comes the money pit." I took it to my local mechanic who's a great and reasonable guy who ran the codes which came up with O2 sensors and the Accelerator Position Sensor. I didn't much care about the O2 sensors, but the APS, I bought online from a Lexus dealer for $350.

The mechanic installed the APS and the car ran great for one day, then... warning lights and limp mode again.

This time I got on the web to do some research and came across this thread. After reading the whole thread I found the links to the Toyota Class Action Settlement website and figured what the heck, I'll give it a shot. So I printed out the relevant pages and made an appointment at my local Lexus dealer to get the car inspected.

They inspection cost me $62.50 (1/2 hour of labor) and came back with the same 1121 code for the APS plus the O2 sensors. At this point the service writer is trying to talk me into $1800 worth of repairs. I showed him the print out from the Class Action site and the guy looked at me like I was crazy. I stayed polite and told him to please check it out on his end, and that I would also contact Lexus and would be in touch. To this day I've never heard back from that guy.

On the way home the car dropped back into limp mode, so I stopped at the garage and asked my mechanic to check the Air Idle Control Valve that has been mentioned on this thread as the culprit part. He called me back within an hour saying that's the one. The connections had cone bad on the part, but he had gerry-rigged it back together just to see if that would do the trick. It did, for a while.

In the meantime I called Lexus corporate. The first person I got had no idea what I was talking about, but put me on hold and asked a superior who got on the line and assigned me a claim number. It took about 2 weeks of my being persistent, but finally last week they called me to say they were sending me a check for the Accelerator Position Sensor that I bought online (I had sent them copies of the receipt), and that they would authorize my taking the car to the dealership for another APS install. I told them thanks for the check, but I didn't see the need for another APS since the one I had in there was brand new. I was going for the full throttle body assembly.

At this point things got a little dicier. The Lexus corporate person started weaseling saying that they could only go by what the dealership was telling them, and according to the dealership, the problem was the APS, but since the car also had these bad O2 sensors, and those WEREN'T covered by the Class Action Settlement, and they really couldn't be sure what the problem was etc...

So I said: OK send me the refund check for the APS, and I'll get in touch with the dealership to make an appointment for the repairs. With the money from that I bought all 4 O2 sensors, and the Air Idle Control Valve and had everything installed by my mechanic. The car is running great. If the limp mode problem returns (which I seriously doubt) I can now take the car to the Lexus dealer and make it their problem using the case number I've been assigned, since the O2 sensors have now been replaced.

So bottom line:

1) Yes Lexus will repair your car if you have this problem.
2) Yes, the bad part is the Air Idle Control Valve, NOT the APS.

Thanks again to all who contributed to this thread.

Goosesedan

So my car codes are P0300, 301, 302 and 303...........also P0171, 0174, 0430. But i have the Limp Mode. VSC light, CEL all on. Does this have anything to do with the Throttle body or the settlement? My dealership is willing to look at and fix it for free if it is related to the Settlement.

keepit

So glad i just found this thread, i replaced the APS and everything was great for about 3 days just got a P1128 code for a failed throttle control motor. Have one on hand but going to try and push it on lexus and see what i can get might put the old APS back on as well and see what i get.