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False code P0765, transmission will not engage fourth gear?

Tiny
KRISTI ABRASHI
  • MEMBER
  • 2001 TOYOTA RAV4
  • 2.0L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
I have a problem with the false code P0765 I replaced the whole valve body from another car with no problems. Can anyone help or give me an idea? The car goes from first to third gear without a problem but doesn't go to fourth gear and when removing a leg from the gas pedal the RPMs goes to 1,000. ATF fluid is perfect, solenoid for this error is in perfect condition works (have tested 4 solenoids for this error).
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Thursday, December 28th, 2023 AT 7:43 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
The code P0765 detects a malfunction with the “D” shift solenoid circuit. So, if we check the wiring from the control solenoid and the PCM and it checks good the PCM is bad.

Here is a guide to help you test the connections and the transmission wiring diagrams so you can see which wires to test:

https://www.2carpros.com/articles/how-to-check-wiring

You can get a pre-programmed PCM by searching Google or Ebay. I have included the location of the PCM and how to change it out in case you need it. Check out the images (below). Let us know how it goes.
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Thursday, December 28th, 2023 AT 11:20 AM

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