Overactive VSC on 2005 Toyota Sequoia

Same rack, didn’t even disconnect tie rod ends. Just replaced the bushings. Only code I’ve gotten in this was p0456 very small evap leak, accompanied by c1201. Reset those though and never came back. No other codes. Stock size tires and no suspension lift. I have sumo springs helpers in the rear to help it from sagging when towing, but stock height. I did the zero point calibration in the driveway pointing straight ahead but didn’t seem to make any difference. I’m confused on this.
 
Vehicle speed sensor(s) ok? The yaw rate should equal velocity x steering angle. If it’s getting an incorrect speed, it may not like that. Transmission shifting ok?
 
Same rack, didn’t even disconnect tie rod ends. Just replaced the bushings. Only code I’ve gotten in this was p0456 very small evap leak, accompanied by c1201. Reset those though and never came back. No other codes. Stock size tires and no suspension lift. I have sumo springs helpers in the rear to help it from sagging when towing, but stock height. I did the zero point calibration in the driveway pointing straight ahead but didn’t seem to make any difference. I’m confused on this.

Did you find the sumo springs influenced body roll at all? If so it would increase yaw. Was the steering sloppy before you did the work, possibly hiding the increased oversteer from the springs
 
Speed sensors seem to be ok but I’ll have to have someone else drive through the corners where it acts up so I can watch the scanner.
It’s hard to say how much they affect body roll. Definitely firmed up the ride in the back but got rid of the sag. I tow quite a bit and the rear is soft on these. They weren’t cheap so I’d be disappointed to be out the price they cost, but maybe I’ll take them off and see what happens. Good point.
The steering was sloppy before. Not sure how to share a video here but before the rack would shift side to side quite a bit. It’s a lot easier to keep in line now with steering feel.
 

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This is a small town and we’re almost 2 hours from the dealer. I might bring it in though.

I doubt you're going to get any decent solution/service from a dealer. They have trouble hiring and keeping people more than 2 months. All of them.

What you're looking for is an independent shop, hopefully Toyota-based (they are out there), with a couple of 40-50 year olds that have worked on Toyotas for 25 years.

Just a suggestion to modify your ways of thinking. I have three Toyotas in the driveway and I have no use for a dealer other than OEM parts.
 
I doubt you're going to get any decent solution/service from a dealer. They have trouble hiring and keeping people more than 2 months. All of them.

What you're looking for is an independent shop, hopefully Toyota-based (they are out there), with a couple of 40-50 year olds that have worked on Toyotas for 25 years.

Just a suggestion to modify your ways of thinking. I have three Toyotas in the driveway and I have no use for a dealer other than OEM parts.
I’ll have to search. We’re in Crescent City, way up by the Oregon border. The closest dealers are at least 1.5 hour drives in one direction or the other. An independent specialist would be great. I’d just like this to handle properly through the curves.
 
I’ll have to search. We’re in Crescent City, way up by the Oregon border. The closest dealers are at least 1.5 hour drives in one direction or the other. An independent specialist would be great. I’d just like this to handle properly through the curves.
Ever resolve this? Experiencing same exact issue and nothing is working.
Thanks
 
The Sequoia VSC system is notorious for being hypersensitive and annoying. I just learned to put up with it. The only thing that ever seemed to make any difference at all is a new/different set of tires. New tires on mine really seemed to calm things down, relatively speaking. Its simply an annoying system in these trucks.

Various parts of the system are known to get funky. Yaw sensors, wheel sensors, etc. You'll spend your grandkid's inheritance trying to figure it out. These trucks are pushing 20 years old and finding someone interested in trying to figure out this system is difficult.

The old Tundrasolutions forum has two decades of threads about working this system, you'll have many cold winter nights worth of reading if you really feel like digging into it.

Not advocating it, but if you want to turn the system off and drive it as an old school vehicle, unplug the sensor on the side of the master cylinder. It will activate your brake light, but it shuts off the VSC system until you plug it back in.
 
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