on 03 dodge 1500 hemi 5.7 most common reason it comes on?I changed the plugs sat and drove it today and the light started flashing.any ideas before I take it to the shop? I took the cover off the intake and looked for loose wires.

They use a funky throttle position sensor with more feedback functions than normal - could just be a failure of it if you can't find any loose wiring.

You might want to go to the Dodge - 'Another One Bites the Dust' forum for some answers, feedback or missery sharing ...
Link - http://www.minerich.com/dodge_ram.htm