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

Front Oxygen Sensor

Front Heated Oxygen Sensor
Output Voltage
Engine Condition Ignition ON Below 1.0 Volts (V)
Idle 0 - 1.0 Volts (V)
Deceleration 0 - 0.5 Volts (V)
Acceleration 0.5 - 1.0 Volts (V)