Automatic Transmission Control Module problems of the 2006 Toyota Avalon

S10 appropriate handling re Toyota vehicle sudden acceleration problem, owner of a 2006 Toyota Avalon experienced acceleration problem. Immediately after purchasing the vehicle, the consumer noticed a problem in accelerating, decelerating and shifting gears in the transmission. Since the vehicle was still under warranty, he took the vehicle back to the dealer a few weeks later. The dealer informed the consumer there was no major problem and that a minor adjustment was made to the shifting points in the transmission. The vehicle functioned fine for a while, but then the same problems quickly resurfaced. A Toyota representative stated the problem was not a defect; rather it was the way the vehicle was intended to handle due to its drive-by-wire system. The representative went on to say the drive-by-wire system did not have a traditional rod that connected the pedal to the engine; rather, the pedal went to an electronic system that sensed the intended acceleration and causes the engine to accelerate as directed by the driver. The consumer was told the hesitation he complained of was normal as the system was determining how much to accelerate. The consumer did not believe the sudden acceleration was due to a sticking pedal; rather a problem within the electronic transmission control module, throttle or onboard computer.

2006 Toyota Avalon. At low speeds, especially after slowing, the transmission acts as if it were in neutral, and severely hesitates, when an attempt is made to accelerate. Dealer says it's normal. There are years of complaints all over the web. I can't believe that some have not been rear-ended or struck when attempting to accelerate into traffic from a highway entrance ramp. Toyota should be forced to redo the programming of the responsible computer chip or replace the chip with one that has a faster clock speed. They should also be held legally responsible for all incidents. The date below is for the latest of near daily, usually minor failures like slowing to turn a corner.

Purchased a certified, used 2006 Toyota Avalon touring model on July 15, 2006. Within the first week of ownership, I noticed a serious hesitation in the transmission, especially at speeds below 10 mph. I took the vehicle to koons Toyota dealership on July 8, 2006 and had the service department shop foreman, drive the vehicle. He confirmed that the transmission was indeed hesitating and that this was a problem for 2004-2006 Toyota siennas, Avalons and camrys that share the same 5-speed automatic transmission. Chris told me that the computer that selects the appropriate gear based on various criteria analyzed by the system is too slow in processing this information, which in turn causes the hesitation and rpm surge before a gear is engaged. I lodged a complaint with Toyota today (case number 200608090063), and was told that the "corporate line" is that the transmission is behaving as was intended. The dealer told me this issue can be fixed by a reprogramming of the computer or replacing the chip with a "faster" version. Obviously, this is a terribly dangerous situation that Toyota needs to address.

The first week I owned the car I noticed a hesitation in the accelerator followed by a lurching forward. Took it to dealer who said it was caused by the drive by wire system and would adjust to my driving in time. No adjustment occurred. I continued to make complaints to no avail until I threatened write to NHTSA. They then said "wait, don't do that. We'll talk to the service manager to see if he has a fix. Within 30 minutes they had recalibrated the engine control module/ecm (sae term: powertrain control module/pcm). Warranty information was: op code eg7023; description recalibrate emc (pcm); time 0. 9; ofp 89661-#####; t1 26; t2 99. The results were good although I sometimes still feel almost undetectable small surges when I am driving as if I am not really controlling the speed with the accelerator. By the way, I had reported this twice before and when I read through all of the 2006 Avalon reports mine was not there. Are the reports deleted after a period of time?.