Hello!

I have a 2013 Civic EX auto with 140k miles. Overall runs well, but the transmission has an issue with kickdown (maybe shifting in general?).

Acceleration is fine when manually shifting 1-2-3, no hesitation or anything of that nature.
Acceleration is non-existent in automatic after about 30 MPH. Flooring the gas pedal does literally nothing. Once it's all the way to the floor, it will make some extra groaning, but not really accelerate.

Anyone familiar with this issue or know which module(s) control it?

Thanks!

 

 

Could it be the shift solenoid? I think there's a specific kickdown controller, but I'm not sure.
Anyone have any ideas?