: Because 21.4 was the terminal update, it became a hot commodity. Shops that missed the window to update found themselves unable to access newer manufacturer-specific codes, making 21.4 the "gold standard" for anyone still running the Ultra.
You can now save up to 100 custom PID lists , doubling the previous capacity. snap-on solus ultra 21.4 update
Added an on-screen "No Communication" message to help technicians identify connection issues more quickly. Report: Snap-on Solus Ultra 21
Includes a new report type that identifies the vehicle system and date of recalibration on a single document. doubling the previous capacity.
Furthermore, the update often addresses minor bugs related to Bluetooth pairing with the VCI (Vehicle Communication Interface) module. A dropped connection mid-diagnosis is a professional embarrassment; the stability patches included in 21.4 aim to eliminate that friction.