Fail safe mode, no response from accelerator pedal

The place to start would be with a scan tool. There are multiple items that can cause the car to go into limp mode. From a bad gas pedal to internal transmission failure. Without scanning it and seeing what it shows as a problem you could end up spending a lot of money and still not repairing it.

Hello,

I have seen a dirty throttle bore cause this issue creating a correlation loss between the actuator and sensor. I would disconnect the battery service the throttle bore then clear the codes and try it again. Here is a guide to help the service and a video to help clear the codes:

https://www.2carpros.com/articles/throttle-actuator-service

and

https://youtu.be/ahK_eucFi-k

Please let us know what you find. We are interested to see what it is.