Question about 2008 Toyota Yaris Sedan

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2007 yaris will not change up to top gear when cold. Is this a problem ? Dealer says it is built in to warm the engine quicker !!!!

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The dealer is wrong. 100%.

Here is the actual reason why it does not shift until warm:

The final upshift is determined by engine temperature. The final shift is prevented from occuring until the coolant temperature reaches 177 degrees F. This is done thru programming in the engine computer. The reason why is: the engine produces a larger pollutant output when cold, in the higher gears. Keeping the last shift from happening decreases the load placed on the catalytic converter. It is really all about controlling emissions.

I hope this helps you out.

Thanks for choosing FIxYa for a solution to your problem. A "FixYa" rating (4 blue diamonds) would be greatly appreciated for my assistance to you. Thanks!

Posted on Feb 23, 2009

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ROUGH SHIFTING PT CRUISER


Some modern vehicles when change the shift pattern while the engine is cold, by keeping the vehicle in a lower gear for a higher rpm while the engine is cold, the engine warms up faster, to reduce emissions. (Emissions are higher while the vehicle is cold)

What you may be experiencing is that the shift from first to second occurs at a higher rpm when the engine is cold than when warm. This can lead to an abrupt or hard shift. At higher speeds, the shift between gears either may not be changed, or just does not feel as hard as the 1st to 2nd shift.

If this is the case, then your dealer is telling you the truth and there is nothing he can do.

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