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.
Images (Click to make bigger)
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Sunday, May 7th, 2023 AT 1:34 PM