How long after you clear a check engine light can pass emissions?

The length of time after clearing a check engine light before a vehicle can pass emissions testing varies depending on the state or jurisdiction in which the vehicle is registered. Generally, if the check engine light has been cleared and no new trouble codes have been set, a vehicle may pass emissions testing within a certain timeframe, typically ranging from a few days to a few weeks, but sometimes longer. It is important to consult the specific regulations and guidelines for your region or state to determine the exact timeframe.