Hi Gang!
Finally my stealer lowered my TPS pressure down to 40 psi. Now I'm learning how to live w/o pushing those freaking buttons every time my truck is started. Feels GREAT!
Now I have this message comes up on and off "CHECK LEFT FRONT TIRE PRESSURE".
Does anybody experienced this issue after reprogramming their ECU?
Thanks.

I just had my dealer lower mine to 40 front and rear as well! I had the 70 psi from the factory on the rear of my lmm and it drove me nuts.

well the sensor will go off if the tires are overinflated or underinflated by a set variance each way. when the dealer set mine to 40 but kept 70psi in the rear tires the warning light went on just like yours. We lowered the pressure to 52 and the light went off! just take some air out of your tire and hopefully the problem will go away. at 55psi with my tpms set at 40 the light comes on because it thinks they are overinflated so I just have to keep it under 55 psi. I think what is happening is your pressure is fine when its cold, say at 53, but when you get moving and the air and tire gets hot it increases your psi by 3 or 4 and you go over your variance it will allow.