Hello, I'm Danny.
The code U2023 is showing your vehicles computer is receiving invalid input information from another module on your vehicle. The first thing for you to do is perform a CAN scan. A CAN- Controller Area Network scan will test and retrieve all codes that are stored in your vehicles computer when your malfunction light is on. This scan will test all systems on your vehicle including the engine, brake, and transmission system and all the other modules. Here is a tutorial showing how to perform this scan:
I've attached the fault code information picture below. After you perform this scan get back to us with any fault codes or module information and we can then properly diagnose the issues you might be having on your Focus. Hope this helps and thanks for using 2CarPros.
Tuesday, September 14th, 2021 AT 8:31 AM