ECM

[CaseyMx]

Any recommendations on reputable online source to buy a replacement ECM? Think mine may have issues. Missing 5v sensor supply voltage at the ECM.

[CamGTP]

Depending on the vehicle it would need to be done at a dealership.

 

Computers won't just be plug and play if they need to be reprogrammed to your VIN and the security system. Also if you vehicle has a TCM and FPCM it must be programmed by a dealership or someone with a dealership level tool to make everything jive together again.

[Bob2C]

Question: i have read about thieves swapping the ecm and driving the vehicle away. How are they able to do that if the ecm needs to be programmed to vin at the dealership?

[davester]

3 minutes ago, Bob2C said:

Question: i have read about thieves swapping the ecm and driving the vehicle away. How are they able to do that if the ecm needs to be programmed to vin at the dealership?

I believe it's that the vehicle runs good enough to drive away, but all the features/options on the truck may not work properly.  Later on, they can either flash the system so everything works right, or they just part the truck out.