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2011 Toyota SIENNA Vehicle Speed Control Problems, Complaints and Defects

Issue ID	897942
Internal NHTSA #	10440617
Manufacurer	TOYOTA MOTOR CORPORATION
Brand	TOYOTA
Model	SIENNA
Model Year	2011
File date	01/12/10
Component	VEHICLE SPEED CONTROL
Product type code	VEHICLE
Description of the problem	Problems : lost acceleration when the car was free running (no gas pedal applied) down hill or declined roads at about 8-10 mph, while the engine speed was 1100rpm or above ( this mostly happened in winter while the engine was cold or not warm up, but it happened in hot engine too), if i stepped on the gas pedal to accelerate the car at this time, the car would not pick-up speed and accelerate; it acted like the car was being driven in neutral; the gas pedal felt lighter than normal; even if the engine was running up from 1000rpm to 1800rpm, i still couldn't feel the accelerating; it acted like continuing its free running. Only when the engine ran up to1800-2000rpm then the car started pick-up some acceleration. In other words, three conditions must happen at the same time to see this problem: 1)free running (no gas pedal applied) down hill or declined roads, 2)free running at about 8-10 mph, 3)engine speed is at 1100rpm or above then step on gas pedal to accelerate. This problem would not happen on up-hill road, or accelerate slowly from speed below 10 mph. I took it to the toyota dealer for inspection today. The mechanic was able to reproduce this problem on a road test with me on the car. He tested other sienna later, while i was waiting. He said all the sienna acted like this way. He reset the computer for transmission to learn my driving habit, hoping it will fix the problem. I believe this is a design in computer programming problem. Resetting computer would not fix the problem. That unable to accelerate my car when i need to is a dangerous, for i might not be able to avoid some dangerous situations on the road.
Vehicle Mileage at Failure
Number of Occurences	1
Source of the issue	NHTSA WEB SITE
City and State	LITTLE NECK, NY
VIN pattern	5TDZK3DC0BSXXXXXX
Was vehicle invloved in a crash?	N
Was vehicle involved in a fire?	N
Was incedent reported to police?	N
Was medical attention required?
Was part original equipment?
No. of injured persons
No. of fatalities
Date of purchase	07/08/26
Was original owner?	N
Anti-lock brakes	N
Cruise control	N
Number of cylinders	6
Drive train type
Transmission type
Vehicle speed
DoT tire identifier
Tire size
Location of tire code
Type of tire failure code
Was defective tire repaired?
Date of manufacture
Type of child seat code
Type of restraint
Dealer's name
Dealer's telephone number
Dealer's city
Dealer's state code
Dealer's ZIP code

What is Recall?
A recall is when a product is removed from the market or a correction is made to the product because it is either defective or potentially harmful.
What is Failure?
Failure is the state or condition of not meeting a desirable or intended objective, and may be viewed as the opposite of success. Product failure ranges from failure to sell the product to fracture of the product, in the worst cases leading to personal injury, the province of forensic engineering.
What is Defect?
Non-conformance of a car component with the specified requirements, or non-fulfillment of user expectations, including the safety aspects.

Last decoded VIN:

SHHEP24703U103000 1GNSKHKCXKR345650 WDB67401215323366 KNAB3518JMT772435 WV1ZZZ2DZ2H022488 WBADT21020GZ10241 WBAHB110X0GA72834 JDAJ100G000510820 WAU2GAFC5GN163989 5J8TC2H68KL000551 1GCDSCDE3A8115830 JM1BL1V87C1680496

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2011 Toyota SIENNA Vehicle Speed Control Problems, Complaints and Defects, Recalls and Failures

2011 Toyota SIENNA Vehicle Speed Control Problems, Complaints and Defects

What is Recall?

What is Failure?

What is Defect?