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Air/Fuel Mixture: Testing and Inspection

Air / Fuel Mixture

CO Content (A/F Mixture) and Idle Speed cannot be adjusted, only checked.

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CO Content is checked upstream of the Three-Way Catalytic Converter (TWC).

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The Heated Oxygen Sensor (HO2S) must be connected during measurement.

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A/C must be switched OFF during measurement.

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Engine must be fully warmed up.

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Automatic transmission: Gear selector lever must be in PARK during measurement.

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EVAP-valve plugged.

    

CO Content ..........................................................................................................................................................................................................  0.2 - 1.0%

Powertrain Management > Tune-up and Engine Performance Checks > Air/Fuel Mixture > System Information > Specifications > Page 3037

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