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)

Or, hide this message: temporarily or permanently

Gas Mass Sensor

Display shows the amount of alternative gas entering the engine in grams per second (g/s) from 0 to 20 and in frequency from 0 to 3000 Hz. This display indicates the amount of CNG entering the engine as measured by the gas mass sensor.