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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Display Group 010






NOTE: The total of the oxygen sensor control and oxygen sensor learning value shows the total effect of the oxygen sensor control, Bank differences can be evaluated directly by comparing display field 1 with display field 2.





Test table display group 010










Notes on display field 4: The display value at times must drop below 0.3 V and exceed 0.6V Display values less than 0.4V indicate lean condition; greater than 0.4V indicate rich condition.





HO2S voltage U Lambda (mV) vs. Lambda (X)

A - HO2S voltage (mV) high
Rich mixture (fuel excess or lack of air)
High CO value

B - HO2S voltage (mV) low
Lean mixture (lack of fuel or excess air)
Low CO value