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Home >> Buick >> 2023 >> Envision Preferred, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (LSY) - Description And Operation >> Description and Operation >> Engine Control Module Description >> Emissions Diagnosis For State I/M Programs
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Emissions Diagnosis For State I/M Programs

This OBD II equipped vehicle is designed to diagnose any conditions that could lead to excessive levels of the following emissions:

The ECM turns ON the MIL and stores a DTC when the on-board diagnostic system detects a condition that could result in excessive emissions.