The primary reason for these cars to go to limp mode is to have a dirty throttle actuator.
Many times a simple cleaning will get this fixed.
Also typically with the limp mode the check engine light gets illuminated. Is your check engine light on? If so get is scanned for trouble code(s). Which can help with the diagnostics.
You can take it to your local auto parts store (if it can be driven) to have it scanned and they will give you the code.
Here is an article that explains the typical low power mode/limp mode issue:
Here is a guide of how to clean the actuator:
I have attached diagrams for your reference.
Please let me know of any questions.
Images (Click to enlarge)
Tuesday, September 21st, 2021 AT 6:08 PM