A few months ago my VSC and Traction Control Lights went off on my 2002 Sequoia. Initially I checked the code on my diagnostic machine. It read out that my Yaw Sensor needed to be repaired or replaced. Went to the dealer they told me it was a brake light switch. Got that replaced, lights were still on. Later they told me it was the Yaw Sensor and apparently the parts were on back order since it's a persistent problem with these Sequoias. Toyota needs to recall Sequoias for this issue, it is expensive to replace these parts and is a manufacturing flaw.

Normally happens at low speed while accelerating. The skidding car symbol flashes, a warning beeper beeps several times, there is a noticeable swerve to the right accompanied by a grinding noise. The, trac off and the vsc off, lights come on and I am able to continue merrily on my way unannoyed, there is no apparent reduction in braking ability or steering control. I just have the "idiot" lights on the dash until I turn off the ignition. When I next drive the vehicle I am very wary until it happens again, maybe immediately, or 10 to 20 miles. But it always happens. The dealer says a new yaw rate sensor and vsc ecu will fix it. About $1800.00 above the $105.00 already paid for the diagnostic fee. What really gets my "goat" is: there is a recall for the "early" 2003 models for this same problem. My car was off the line Aug 22 2002 I'm thinking there may have been '03s being built then.