My ECM module can't get my key to program?

Tiny
DENNIS HEN
  • MEMBER
  • 2012 BUICK VERANO
  • 2.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 106,234 MILES
I replaced my ecm module with a rebuilt one now can't get my key to program to the module. Why?
Friday, February 13th, 2026 AT 8:32 PM

5 Replies

Tiny
DENNIS HEN
  • MEMBER
  • 5 POSTS
  • 2012 BUICK VERANO
  • 2.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 106,234 MILES
You trying to get my key programmed to my rebuilt ECM
Was this
answer
helpful?
Yes
No
Saturday, February 14th, 2026 AT 8:49 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,291 POSTS
When you got the rebuilt ECM was it programmed to the car? If not this is your problem, I would call these guys to help.

https://www.flashmastersecm.com/

Can I ask if the security light is flashing while you are cranking the car over? if so this will be the problem. Let me know what happens please, Ken
Was this
answer
helpful?
Yes
No
Saturday, February 14th, 2026 AT 8:52 AM
Tiny
DENNIS HEN
  • MEMBER
  • 5 POSTS
Yes
Was this
answer
helpful?
Yes
No
Saturday, February 14th, 2026 AT 1:27 PM
Tiny
DENNIS HEN
  • MEMBER
  • 5 POSTS
Security light does flash while cranking
Was this
answer
helpful?
Yes
No
Saturday, February 14th, 2026 AT 1:29 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,291 POSTS
Yep, that is the security system enabled. The ECM will need to be programmed. You can have a mobile locksmith come out to do the job/program the ignition key it should cost about $250.00 of call he website above to see what they can do.
Was this
answer
helpful?
Yes
No
Sunday, February 15th, 2026 AT 9:08 AM

Please login or register to post a reply.