Check engine light turned on and the RPM's will not go over 3,000

First step is to have the computer scanned for code.

go to this link:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

You have a 2.5L 5 cylinder I'm assuming? The ECM most likely has a fault for one or two knock sensors which will throw the ECM into limp mode, which means it will limit it's RPM. Replace the affected sensors and clear the fault. It will be good to go!

Good evening,

There is a fault code stored in the ECM and that will help us narrow the area of failure. Once we know that code, we can help you determine the root cause of the failure. A parts store will read the codes for you for free.

https://www.2carpros.com/articles/reduced-power-limp-mode

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

As far as the limiting, that is the ECM. It is doing this so you can continue to drive the car until repairs are made. Once the code is diagnosed and repair, it will go back to normal.

https://www.2carpros.com/articles/engine-has-low-power-output

Roy