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

Display Groups 30-49, 99, 107 (Oxygen Sensor Control)




Display group 30 -Oxygen sensor control


Display Group 30:






Significance of figures in 3-digit number block, display zones 1 and 2 - status of Oxygen sensor control before and after catalyst







Display group 32 -Oxygen sensor control


Display Group 32:






Evaluating display zone 32, display zones 1 and 2 - Oxygen sensor learned values












Display group 33 -Oxygen sensor control-Oxygen sensor control values


Display Group 33:






Evaluating display group 33, display zone 1 - Oxygen sensor regulator before catalyst







Display group 34 -Oxygen sensor control-Oxygen sensor diagnosis before catalyst


Display Group 34:






Display group 36 -Oxygen sensor control-Operational readiness of probe after catalyst


Display Group 36:






Evaluating display group 36, display zone 1 - Oxygen sensor voltage, Oxygen sensor after catalyst







Display group 37 -Oxygen sensor control-Oxygen sensor


Display Group 37:






Display group 41 -Oxygen sensor control-Oxygen sensor heating resistance


Display Group 41:






Display group 43 -Oxygen sensor control-Oxygen sensor aging behind catalyst


Display Group 43:






Display group 46 -Oxygen sensor control-Catalyst diagnosis (conversion test)


Display Group 46:






Display group 99 -Oxygen sensor control-Oxygen sensor control operating condition


Display Group 99:






Display group 107 -Oxygen sensor control-Diagnostic fuel system


Display Group 107: