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Not exactly - acceleration was not erratic it went into limp mode accelerating after slowing down for a stop light. It went out of limp mode with check engine still on and 4lo flashing after I pulled over and restarted the truck. Used Carista to reset has not triggered again.
I was was wondering what others w this code have found especially at +50K miles - cleaning throttle body helped or something else cause?
I just had the dealer do the airbag recall plus some brake work and injector/carbon buildup flush the day before and wonder if that had any correlation. I also use Pedal Commander - been working well for past 4 mos and still is but wonder if that might have been a cause but doubt it.
I’ll probably clean the throttle body as a proactive next step.
Well crap - actually before I got home yesterday it got much worse and in fact techman to your question it did have the same revving symptoms. Kind of like the truck is testing the throttle over and over to reset the code and get out of limp mode. It went from 1100 rpms up to about 1800, then down to 700.
Anyway I’ll update this once dealer tells me the problem. Betting the throttle body needs to be replaced.
The injector/carbon cleanup is kinda suspect. Do they clean the MAF and intake area with that service?
So in the end had to replace the throttle body. When I cleaned it I noticed it wasn’t closing quite all the way.
Dealer said they don’t do the intake cleaning thru the throttle but rather thru an o2 sensor. So I doubt they clean the MAF if that’s the case. I cleaned that as well and it didn’t help percent the P2111 code.
So as far as I can prove this part straight up failed at 82K. $800+ fix if you let the dealer do it.
My 2011 GX with 120k miles threw every light in the book last night, while driving. Loss acceleration, 4LO light, CEL, Xmas lights all over the dash.
Figured it was this: https://www.clublexus.com/forums/gx-...-miles-14.html
...but service records show that the air injection and valve work was completed by previous owner.
Diagnosis from dealer was:
’Found DTC for malfunction of throttle position sensor. Upon further diagnosis, found interval short in TPS - is built into the throttle body.’
Codes thrown are below.
$1100 out the door, parts being ordered. $600 for the throttle body.
Thoughts? I did not find this as a common replacement on our vehicles with a search.
After seeing how quickly it is to take things off to clean throttle body today...and TB has only 4 bolts and a connector it looks like less than an hour to swap part.
’Found DTC for malfunction of throttle position sensor. Upon further diagnosis, found interval short in TPS - is built into the throttle body.’ I had that experience, a '12 with 80k
I had to swap mine. Inside the control feedback circuit there is a trace that can get worn, mine was at the area for about 1-2000 RPM. Makes sense since thats the most common range im in.
The same symptoms can call for the ECU to be changed on say a sienna or tundra. could be that the parts drift and since the ECU reads the position sometimes a change on either one fixes it. I believe the ECU was covered in the emissions warranty 10yrs while the TB wasnt. In my case I did open the TB circuit to check it out. visible trace wear.
Got mine from CARID for about 190$. Theres a couple bolts, a connector and a line, takes <30 min to swap out. was a reman, looks like they are 210$ now.
the GX doesnt have an external sensor like older vehicles and even some newer ones you can replace separately.
they say a short but really ive only ever seen opens.
looks like this inside - not the gx, just an image i found
When you replaced did you notice any anomalies with idle or initial stall but restart without issue afterwards?
Just curious if I ever had to replace this years down the road.
Thanks!
Originally Posted by John00
’Found DTC for malfunction of throttle position sensor. Upon further diagnosis, found interval short in TPS - is built into the throttle body.’ I had that experience, a '12 with 80k
I had to swap mine. Inside the control feedback circuit there is a trace that can get worn, mine was at the area for about 1-2000 RPM. Makes sense since thats the most common range im in.
The same symptoms can call for the ECU to be changed on say a sienna or tundra. could be that the parts drift and since the ECU reads the position sometimes a change on either one fixes it. I believe the ECU was covered in the emissions warranty 10yrs while the TB wasnt. In my case I did open the TB circuit to check it out. visible trace wear.
Got mine from CARID for about 190$. Theres a couple bolts, a connector and a line, takes <30 min to swap out. was a reman, looks like they are 210$ now.
i did have it stall the first time after changing the part. then after that it ran high idle for a while. eventually it learned and corrected then back good as new.
it would go into limp mode anytime the throttle position hit the problem area in the trace, which was real low rpm.
to get around this until the new part arrived 2 days later, i had a fun time in the gear select mode at all stoplights to keep the rpms from going below 1400.
a medium term fix is to get some conductive paint, drill out the rivets, clean and paint the traces, then put back together with screws. it will last a while but not near as long as the original traces.
could also use the stick on trace repair. my guess is those would last a long time.
Figured I would complete the last chapter of this story, being that I started this thread.
As it turns out, I replaced the throttle body - which was not the culprit.
Then I replaced the gas pedal(which has a built-in sensor) - as I understand it. Again, not the culprit.
Last, I replaced the ECM(most expensive part of them all) - and that did it...I was fully running again, no codes.
Let's just say, that I was emotionally drained with this issue...being the most expensive issue that I've ever had to deal with on a vehicle - with the exception of a engine or transmission replacement.
A bit disappointed in the ordeal, but glad to be enjoying my GX again.
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Symptoms
Throttle Body replacement
