Poor Gas Mileage, check engine light and sudden acceleration
 

How do you drive? Heavy foot or grandma? Use the A/C alot? Stop and go traffic? Short trips? Are the tires inflated to the correct temps? Do you ride the brake or forget the release the parking brake?

As for the car acceleration by itself, that's usually a driver error. That's what Toyota found. People were pressing the gas instead of or at the same time as the brake.

Have the computer read to find the code causing the CEL. That may be the reason for the lower fuel mileage.

Ghost...
 

I live in NYC so you guys can imagine the traffic I am not expecting to get 29 MPG but at least 23 MGP. I do not ride the brakes. I never use the parking brakes either. I do on the other hand use the AC a lot. I am well aware of the Toyota acceleration problems but this is not the case. On my first post I mentioned about my engine light that came on but the same night around 7 pm the engine check light went off. I am really confuse, last time I took my vehicle to the dealer and told me that if no light is on then they cannot get a reading... I was going to take the vehicle to the dealer but I couldn't i made an appointment for next week. I hope the find the problems and fix it.

IMO the acceleration has to do with the combination of two factors:

1) brand new transmission exerting much more force than a worn-in transmission, even with no pedal use

2) A/C on means compressor running, putting more stress on system and causing more force to be exerted via transmission (from full stop). The car accelerates less in general when compressor is running, though.