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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.7L (L3B) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> Inspection/Maintenance System Check >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

For an overview of the component/system, refer to Inspection/Maintenance Description and Operation

Several states require vehicles to pass the inspection/maintenance (I/M) emission inspection in order to renew the vehicle's license plate.

This diagnostic verifies the vehicle is I/M ready by confirming the I/M System Status monitors are Complete and that no Permanent DTCs are set.

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