It downshifts/brakes and slows down then goes back to normal shifting?

Tiny
MARKTRICK100
  • MEMBER
  • 2000 TOYOTA RAV4
  • 2.0L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
My vehicle listed above has this issue where it downshifts/brakes and slows down then goes back to normal shifting, usually does it in the mornings. Some mechanics tell me it's the control unit, the other tells me he needs to fuel tank and pipes, air cleaner and more to trace issue.
Sunday, March 24th, 2024 AT 3:59 AM

6 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,480 POSTS
I have seen a bad front speed sensor cause this problem, lets run the codes to see if any are stored, this guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is the location for the front sensor in case a code is present for it. Also, check the transmission fluid level as well. Can I ask if the transmission has been serviced? Check out the images (below). Please let us know what happens.
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Sunday, March 24th, 2024 AT 10:35 AM
Tiny
MARKTRICK100
  • MEMBER
  • 3 POSTS
It's the RAV4 second generation, with 1AZ-FE, yes, I have had the fluid changed, codes were reset, drove well for a week for about 220km and now the issue is back.
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Sunday, March 24th, 2024 AT 12:45 PM
Tiny
KEN L
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  • 50,480 POSTS
Which codes were they? Is the check engine light on now?
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Sunday, March 24th, 2024 AT 2:28 PM
Tiny
MARKTRICK100
  • MEMBER
  • 3 POSTS
I don't remember the codes, I remember seeing something about "brake circuit".
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Monday, March 25th, 2024 AT 8:22 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,480 POSTS
We will need to rescan the car to see what the codes are to help you repair the car. Please let me know what comes up.
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Monday, March 25th, 2024 AT 8:56 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,480 POSTS
Anything?
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Saturday, May 11th, 2024 AT 12:52 PM

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