Enjoying my 2007 ES 350 Black on Tan Lexus, premium Edition... fabulous car. Now 83,000 km's and I notice the display in the dash that gives mpg, outside temps, miles till empty etc. is giving false and incorrect readings. Specifically, the mpg while travelling. The bar graph moves to the extreme right while not movong at all and jumps erractically while driving.

Anyone had this issue and what to do? Afraid to take it in to the dealer.