Your truck is under warranty, therefore everything except regular maintenance is free of charge. That includes any light, problem, rattle, etc, that annoys you in any way. Maybe the dealer misunderstood you somehow?jared26 said:The malfunction idicator light came on today with 9400 miles on the clock. I checked the gas tank cap and the tank is half full. Still the light persists. The dealer says that just to plug in the code reader is $100. So I'm a little pissed right now.