Last post on Apr 09, 2013 at 3:28 PM
You are in the Toyota Sequoia
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Toyota Sequoia, Auto Repair, SUV
#4 of 9 Re: VSC Warning Issue [911lil]
Aug 05, 2012 (5:03 pm)
We didn't experience pulling. The VSC warning light flashed intermittently and the vehicle slowed to ~50mph. RPMs would increase with the accelerator but mph would not. In at least 4 of the 5 occurrences, we had been driving for an hour or more and stopped briefly (3 times for gas and 1 time I recreated the scenario by stopping in a rest stop). The problem started when we got back on the highway. I drove straight to the dealer when it occurred the last time, left the vehicle running but, alas, nothing registered on the computer. 3 days at the dealer and we couldn't recreate the issue. They cleaned the speed sensors (found oil on one) and now we are keeping our fingers crossed. I'm heading out on Tuesday and will see if I can recreate the issue.
#5 of 9 Re: VSC Warning Issue [911lil]
Aug 06, 2012 (10:42 am)
Most likely a loose, failing yaw sensor, second possibilty, much less likely, a interittent stearing wheel rotational position sensor. Sounds as if the VSC is trying to correct for a yawing condition (over-under stearing) that doesn't actually exist.
Light shaking in the rea rgoing downhill, especially in the "wet" seems somewhat normal (2001 F/awd RX300), it's the automatic brake pressure distribution system activating.
#6 of 9 Re: VSC Warning Issue [wwest]
Aug 08, 2012 (10:39 am)
Well, my test on Tuesday didn't go so well. I was able to make the issue occur again so it appears the speed sensor is not the issue. This time, I had been driving about 45 minutes. I turned the cruise control on and as soon as I accelerated, the warning light flickered and the car slowed - no beep, no engine light. I then put the car in NEUTRAL and the warning light would flicker again when I pressed on the accelerator. So here is what I can tell you:
It has happened 9 times.
7 times followed a stop for gas during a trip that was an hour or longer.
2 times the cruise was on.
2 were during short trips accelerating above 60 MPH.
All instances were on flat dry pavement.
When at highway speeds, the car will slow to 50MPH even when the RPMs redline.
The warning light will flicker when at highway speeds, with the car in neutral and the accelerator is pressed.
The steering wheel alignment has been checked.
The speed sensors have been cleaned.
#7 of 9 Re: VSC Warning Issue [ukgoffer]
Aug 18, 2012 (7:50 am)
This one is easy. We just had the same problem, my wife fixed it yesterday. Go buy yourself a pint of brake fluid, top off the reservoir. Problem solved.
We had our 2001 Sequoia brakes worked on right before we went on a long road trip. The mechanic must have spilled some brake fluid. We got VSC OFF, VSC TRAC, and BRAKE indications in the cockpit. Then we started have sudden power dumps while at highway speed. Thought we had a really bad problem, even rented a minivan for a day because we were afraid to drive it, and we had to get somewhere.
About a year ago we had similar indications, but we also had an ABS light. That problem was a bad O2 sensor, which went away when we replaced the two upstream O2 sensors.
Check your brake fluid, if it is low, fill it up just past the high mark.
#8 of 9 Re: VSC Warning Issue [ukgoffer]
Dec 04, 2012 (10:59 am)
Just saw this post as I was looking for something else and thought I would comment. Was it the gas cap was loose or missing? Toyota has lights for all sorts of systems, yet is the gas cap is not on properly the VSC light comes on!
Wonder who the dim-witted engineer was that designed that.
#9 of 9 vsc lights turn into engine replacement
Apr 09, 2013 (3:28 pm)
My VSC lights and check engine lights came on and my SR5 was running a little rough. Looked on the forums and reset the gas cap to get lights to go off. A day later they came on again this time with the engine light flashing. I take it to get it looked at and get a call that an ignition coil had gone bad and needed replaced to the tune of $450. Not what I wanted to hear, but not terrible. I get a call today and the price has now gone up to $5500 and the engine needs replaced. According to the technician a spark plugged worked loose allow combustion gases to melt the cylinder head and distort it. They could just replace the cylinder head for $4500 but no guarantee that any other debris might be in the engine and cause further problems. I'm just wondering if anyone else has ever had this issue or heard of this issue.