Hi....welcome to the Forum
Sounds like the system has lost its memory
P2102
Featured snippet from the web
OBD II Fault Code
The throttle motor is controlled by the engine computer (PCM). If the PCM does not see the requested movement from the throttle motor, code P2102 will set. The PCM may also put the engine into "limp home mode", limiting the available power from the engine to prevent unwanted acceleration.
I would ensure the fuse is securely located in position and the battery is fully charged and then try turning it over with the throttle pedal moving up and down smoothly to relearn the settings