Originally Posted by Unsp0kn
Don't turn off the gauge show!
The gauge "sweep" is important, so leave it on. When starting the car, the ECU goes through an initialization process that tests various sensors, etc. The gauge "sweep" is an indicator that this is happening during these few seconds. When I turn on my car I always let it go through the full "sweep" or "test" process before actually starting the engine. Long term, this may help avoid communication issues between the various sensors and the ECU as well as helping your engine run better.