Posts Tagged: how OBDII monitors work

How OBD IM Monitors Actually Test Your Emissions System

How OBDII IM Readiness Really Works Quick Summary OBDII IM (Inspection and Maintenance) monitors are diagnostic systems in modern vehicles that continuously check whether emissions-related components are functioning properly. They run automated tests on systems such as the catalytic converter, oxygen sensors, evaporative emissions system, and EGR valve by measuring sensor data during normal driving conditions. When a monitor completes its diagnostic test successfully, it sets a “ready” status; if it detects a malfunction, it triggers a check engine light and stores a diagnostic trouble code. Vehicles typically need most … Read More