Malfunction Indicator Lamp (MIL): Design/Purpose
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
When a malfunction which increases exhaust gases is detected, ECM turns ON MIL and informs the driver of the necessity of inspection and repair.
When a malfunction which causes damage to the catalyst is detected, ECM immediately blinks MIL to alert the driver.
NOTE:
- ECM turns ON MIL (yellow) when an emission-related malfunction occurs or when a component part specified by local laws and regulations becomes inoperable three trips in a row.
- ECM may turn ON MIL (red) when a malfunction occurs in the engine.