New radio install, or is it something that worked before and now doesn’t?

If a new install:
Remove servo horn from servo
Turn on radio and car, center steering trim on radio
Re install servo horn with steering centered as best as you can get it
Use steering sub trim to better center (in the menu system, optional, but recommended)
Then set steering travel left and right (aka endpoints, very important)
Use steering trim for ongoing centering adjustments (the one above the wheel)

Also reset throttle servo in the same manner. Or go through the speed control calibration process if its an electric.

If not a new install, suggest trying the parameter calibration process. Be sure to follow each step by the manual.