Thats right...cops arent actually trained to have the skill to know whats exactly wrong with a car, thats what the inspectors at the pits are trained to do.

So if they suspect something is wrong (and in most cases its pretty damn obvious IE bald tyres, suspension, tints, etc), they'll issue a work order so someone who knows what they are looking for, can go over your car.

Some cops know whats goin on because they are car enthusiasts, but some have no fucking idea, and they'll sticker you for stupid things.