2006 Toyota Sienna electrical system problems

“The vehicle stability control system randomly engages and activates the brakes without cause. This can happen on a gentle curve going under the speed limit. It is very scary and I am afraid it is going to cause an accident. Internet research shows many owners with this issue and no information on the cause or a fix”

“While driving vehicle on dry, non slippery roads with slight to moderate curves, vehicle illuminates Traction Loss light, sounds alarm buzzer, and at times applies brakes and dethrottles engine, even when no loss of traction has occurred. This happens while driving on straight roads with slight unevenness. Had to disconnect wheel speed sensor harness to disable ABS/VSC system. When this happens, the vehicle automatically applies brakes to certain wheels and dethrottles the engine, this can pull the vehicle to one side sharply and can cause an accident.”

“Vehicle shut off when going over the drain pipe I rolled it into a gas station turned it on and off switched gears and it started to roll back on drive I tried to move the gears and turned off the the vehicle after ward no gear worked.”

“THIS HAPPENED TO OUR 2006 SIENNA TODAY I WAS ABOUT TO STOP THE CAR WHITE PARKING IT; WE PUT THE PARK THEY SILL RUN; THEY NEVER STOP, SO I TURN OFF THE ENGINE; NOW THEY NO MORE START VERY DAMAGED”

“WHEN DRIVING THE VEHICLE REGARDLESS OF SPEED OR DRIVING CONDITION THE TRACTION CONTROL SYSTEM RANDOMLY ACTIVATES (IT IS ALWAYS WHEN GOING AROUND A CURVE, BUT ROAD CONDITIONS ARE DRY, SPEED COULD BE 70 OR COULD BE 20, THERE IS NO LOSS OF CONTROL BY ME AS A DRIVER). THIS CAUSES THE CAR TO ABRUPTLY BRAKE. THE COMPUTER SYSTEM SHOWS NO ISSUES WHEN THE DEALER LOOKS AT IT. WHEN I DEACTIVATE THE TRACTION CONTROL SYSTEM USING THE BUTTON THE VAN WILL STILL BEEP LOUDLY INDICATING A LOSS OF TRACTION CONTROL. IT WILL ALSO KICK OFF THE CRUISE CONTROL, BUT DOES NOT ACTIVATE THE AUTOMATIC BRAKING FEATURE. THIS HAS BEEN HAPPENING DAILY FOR 2 MONTHS WITH MULTIPLE VISITS TO REPAIR SHOPS.”

“TL* THE CONTACT OWNS A 2006 TOYOTA SIENNA. WHENEVER THE CONTACT PARKED THE VEHICLE AND ATTEMPTED TO TURN IT OFF, THE KEY WOULD FALL OUT OF THE IGNITION. THE CONTACT STATED THAT THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBERS: 17V657000 (POWER TRAIN) AND 14V273000 (TIRES). THERE WERE NO WARNING INDICATORS ILLUMINATED. THE DEALER WAS NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND PROVIDED NO ASSISTANCE. THE FAILURE MILEAGE WAS 177,000.”