Hi, I went out to start the car today but it would not turn over, then i saw that the security failed read out was on and the light on the center console was staying on, but then starts to flash 2 pause 3 times = Code 23, i have been told it's code U2510 CAN - Invalid data for seems not to recognize the key, and to could be the battery that's fauily.

The battery is not great and i was going the change it before winter.

I only have the 1 key so i don't know if that's the problem, the car was fine 2 days ago but i did notice a very slight delay when i was turning the key for the first time in the mornings but it was fine after once it was warm, i first noticed this about a week ago but i thought it was just needing a charge and would be fine once it was running.

I hope someone can help me, thanks.