What is the difference between pending and stored diagnostic trouble codes?

A pending DTC is displayed in yellow and indicates a fault was detected on the first trip, but the MIL (Malfunction Indicator Lamp) has not yet been commanded on. A stored DTC is displayed in red and indicates the fault was detected on consecutive trips, causing the MIL to light. Stored codes are the highest priority and have freeze frame data associated with them. If a pending code is not detected again on the second trip, it is automatically erased from the computer's memory.