Help... I have a 2004 Tundra with 28,500 miles on it. I've never had problem one with it other than recently having to have the windsheild replaced. Just took it in for a safety and emission inspection and failed the emissions test. Garage told me the on board emmisions sensors/computer would not respond. The Garage told me to drive it for another 100 miles and bring it back to see if the computer had reset.

For all intents and purposes this is a new truck. Is this a warranty issue? I'm told the on board computer is fine otherwise I'd see an indicator light on the dash. What's up?