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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Fuel Level Sensor: Description and Operation

The fuel level input comes across the CCD bus from the body control module. this input is used for the Fuel System and Misfire Monitors.

If the fuel level is below approximately 1/16th of a tank the Fuel System and Misfire monitors will be disabled.