So just bought my 2013 Crew Max Tundra with 14,800 Miles on it. Tire light came on the 2nd day I bought it so I took it into Les Schwab and they couldn't find anything wrong. Light stays on, get in my truck this morning and Mait Req light flashes then disappears. During my drive this morning to work the oil pressure gauge was going up and down. About 3/4 to 1/2 while i accelerated and down when i was coasting. I have an apt today from the dealership, should I be worried about all these problems and only owning the truck for 5 days?