yes ,they come with a boost gauge(i don't know how accurate it is)stock,almost every car i've ever driven either new or used have these lights come on at start up.it's just to make sure the light and sensor work.if the light stays on as the car runs there is probably something wrong.turn the car off and check the codes with a jumper or an obd one or two scanner.if the light shuts off after the car is started that is normal.if you have or are a mechanic inspect cylinder compression,leak down test,test every thing.have someone drive behind you to make sure the car is not dog legged ,remove wheels and inspect brakes and suspension,if all major things check out,buy,buy,buy!!!
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