How do you get codes from a Jeep liberty?

To retrieve diagnostic trouble codes (DTCs) from a Jeep Liberty, you can use an OBD-II scanner. Simply plug the scanner into the OBD-II port, typically located under the dashboard near the driver's seat. Turn on the ignition without starting the engine, and follow the scanner's prompts to read the codes. Alternatively, you can also use the "key dance" method by turning the ignition on and off several times to display codes on the odometer, but using a scanner is more reliable.