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I am trying to fix this car for a friend. She says that it doesn't start. I came over and took a look, put the key fob in the hole and pushed it... nothing... dash and gauge lights up... my code reader powers up BUT it never seems to connect to the car's ecu.

They did bring it to a small mechanics shop and they mention the fob battery being 'maybe dead',

I am going to take a look again later, BUT I am just not sure what the common pain points are for this car with the issue. Any help would be much appreciated. Thank you
 

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Even if the fob battery is dead, since it is inserted into the dash, it will still work, as evidenced by the dash lights coming on.

Is there a brake pedal light on the dash? It will go out when you press the brake while in park. If it does not go out when the pedal is pressed, start with that. Also, do the brake lights work?
 
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