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The 4lo blinking and does not switch to 4H? P0766 code?

Tiny
TRAINZ MARTINZ
  • MEMBER
  • 2010 LEXUS GX 460
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
The car RPMs not firing fine, and the car was scanned, I will attach the printout results. Heater sensor 1, transmissions gearshift valve D, secondary injector system, brake switch A/B. Now it has been rectified all the fault code gone remains 4lo and heater sensor 2 came out. I tried switching to 4h not changing. When the car is moving it seems all the gears are not changing reading it with a scanner gear 1, 2 and 3 changes others don't. My question now is, could this be an electrical switch issue or center differential issue? Thank you
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Sunday, May 7th, 2023 AT 2:27 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,648 POSTS
Here is what is said for the p0766 code:

The P0766 code in your 2010 Lexus GX 460 indicates a problem with the shift solenoid D circuit in your vehicle's automatic transmission.

So, I would change out the shift solenoid D and check the wiring connector that feeds it. I am not sure if that will fix the blinking 4lo blinking light, but we need to fix the code anyway so let's keep our fingers crossed. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Sunday, May 7th, 2023 AT 1:34 PM

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