False code P0765, transmission will not engage fourth gear?

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).

Thursday, December 28th, 2023 AT 7:43 AM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
54,144 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.

Images (Click to make bigger)