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2014 Toyota Corolla CVT transmission slipping


Topic starter

Hey I love your channel and listen to it going to and from work almost everyday! 

So I have this 2014 Toyota Corolla with a CVT and 106,000 miles on it which absolutely runs great! The only problem I’m trying to figure out is when I drive my car for a period of time the RPMs surge go from 1500 to 2000 rpm going uphill or when I accelerate. 
I changed the plugs, cleaned out the throttle body, ran sea foam through the gas, and did a fluid change not a flush on the CVT. Even after all that it still does it. 
mom at a loss on what it could be because it only happens when I have been driving it for miles And not when it’s cold or when I first started up. Could it be a bad fuel pump or injector? Could it be my transmission slipping? 

Can you please make a YouTube video of the surging and post the link here?

Isn't it supposed to do that?

5 Answers

When was the last time you changed the fuel filter? Have you already pressure tested the fuel pump?

Also, see here -

I haven’t tried that yet so I wanna hope that it is not the transmission. Maybe the pump is over heating and it starts to slow down and speed up. Hmm

Your video leans more towards misfiring/hesitation, rather than CVT behaviour when driving uphill. Try the fuel filter first & pressure test the fuel pump. Alternatively you can pay a mechanic to test it for you (including the transmission).


Have it scanned for codes and report back, please.  Free at auto parts stores.

Sorry I should have put this in the question also. There are no codes in the ecu to be seen. This is why I’m at a loss on what to do.

You need a professional-grade, dealer-level scan tool for transmission codes. An inexpensive generic OBD2 code reader won't do.

Maybe in an find one somewhere. I thought the same thing because I know the dealer scanner can see all sensor coming on and off, shift points, etc.

Posted by: @gilxmas

the RPMs surge go from 1500 to 2000 rpm going uphill or when I accelerate. 

is that unusual?

Well it does it over and over. Almost like its hunting for gear or something.
I don’t notice it until it happens over and over. For now it just does it about 500-700 rpm surges not matter what rpm range.

ah ok. That's unfortunate. It may need a CVT replacement.


The CVT in my wife's 2019 Forester has some quirks also.  I think it's just the way they are.  I told her to get a RAV4 with a regular tranny but would she listen!??  No!!

This post was modified 7 days ago by Tierodend

Replace the CVT fluid. if it makes it better, dump the car asap.