A smog test checks vehicles for excessive pollution, or that have a high potential to pollute, by analyzing their tailpipe emissions, their on board diagnostics systems and other non-monitored components. Smog check tests vary by the type of vehicle as manufacturer’s build their emissions systems to fit specific vehicle designs. A smog test may include:
Visual examination of emissions control systems and parts.
Functional check of the on-board diagnostic system (OBDII), check engin... read more