The official DualShock 3 / Sixaxis has no turbo button. You may be confusing it with:
Adds scripting (turbo, anti-recoil, macros) to any controller on PS3/PS4/PS5/Xbox/PC. Detected by kernel anti-cheat (Ricochet, Vanguard) → hardware ban.
No native turbo. Use third-party pad for single-player only; avoid online.