Join Date: Dec 2008
Location: Tyler, TX
Thanked 407 Times in 347 Posts
Any one reflash may or may not change the code from what it was with the "old" program.
So, lets say you start with code 1X234 and it gets reflashed before you buy it. The new code may, or may not be 1X234 anymore. The reflash updates the programming but not necessarily the operating system.
Think of the "catch code" as the operating system on a PC. There are lots of OSs... Win3.1, Win98, Win2000, Win2000Pro, WinXP, WinXPsp1, WinXPsp2 etc. You can run software (flashed version) on Win98, but not maybe on WinXP. Later software versions are generally more capeable systems.
So, when your truck's PCM gets updated, it could just be revised PROGRAMMING, or both programming AND the OS.
'93 F-250 HD, 7.3L IDI, 5spd - FARM TRUCK
I Support: Trailer brakes an every axle over the towing vehicle's GVW; CDLs for RVers; Safety inspections for ALL vehicles and 6 axle trucks (97K GVW proposal).
Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote - Benjamin Franklin
I vote for LIBERTY!