Download Malfunction Indicator Light (MIL) For most DTCs, the Check Engine Indicator (located in the lower portion of the tachometer) will illuminate when a fault is detected on the second drive cycle. See Fig. 1 . Only catalyst-damaging misfires, certain internal ECM failures and Controller Area Network (CAN) faults will illuminate the Check Engine Indicator when the fault is detected on the first drive cycle. In certain circumstances, the Message Center (located in the lower portion of the speedometer), will display fault warning information simultaneously with the Check Engine Indicator, or when a fault is detected on the first drive cycle. Also, in certain circumstances, the Amber or Red MIL (located above the Message Center) simultaneously with the Check Engine Indicator and Message center indicating the priority of the fault. Red MIL indicates a primary warning, loss of power and driveability. Do not drive vehicle. Amber MIL indicates a secondary warning, loss of power and driveability. Vehicle may still be driven.