Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Malfunction Indicator Lamp: Description and Operation

The Malfunction Indicator Lamp (MIL) alerts the driver that the Powertrain Control Module (PCM) has detected an OBD II emission related or system malfunction. A Diagnostic Trouble Code (DTC) will be set when this occurs.
The MIL is located on the dashboard and is labeled CHECK ENGINE.