hard start and check engine light since moving from lower altitude

12 years???thats crazy.try disconnecting the negative cable only, for 10 minutes.leave positive connected to battery.hook negative back up after 10 minutes.see what happens.

Manifold Absolute Pressure (MAP) sensor compensates for altitude... Should read same as barometric pressure 'at location' on scanner live data... As well as what the actual problem is! Each time the engine will not CRANK because of dead battery.. Codes have been erased... I can not understand why this can't be fixed! What is the repair facility's excuse?