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

2000 TOYOTA RAV4
150,000 MILES • 2.0L • 4 CYL • 4WD • AUTOMATIC
Avatar
MARKTRICK100
  • MEMBER
  • 3 POSTS
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.
Mar 24, 2024 at 3:59 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 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.
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Mar 24, 2024 at 10:35 AM
Avatar
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.
Mar 24, 2024 at 12:45 PM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Which codes were they? Is the check engine light on now?
Mar 24, 2024 at 2:28 PM
Avatar
MARKTRICK100
  • MEMBER
  • 3 POSTS
I don't remember the codes, I remember seeing something about "brake circuit".
Mar 25, 2024 at 8:22 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 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.
Mar 25, 2024 at 8:56 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
anything?
May 11, 2024 at 12:52 PM