Transmission, rough shifting?

Hi,

First, make sure the transmission fluid is clean and full.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

If the fluid is clean and full, take a look at this link:

https://www.2carpros.com/articles/detailed-guide-to-diagnose-and-repair-hard-shifting-in-automotive-automatic-transmissions

Since you mentioned the check engine light turns on, I would recommend scanning the computer for diagnostic trouble codes. In this case, the can-bus would be the best thing to scan.

CAN stands for controller area network. Basically, all the different modules are tied together via a few wires. This type of scan will retrieve codes regardless of the module storing them.

Here is a link showing how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let me know what you find.

Joe