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V90 L6-2.9L VIN 96 B6304S (1998)

Maintenance > Tune-up and Engine Performance Checks > Air/Fuel Mixture > System Information > Description and Operation > Page 730

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Adjusting CO Content

Do not adjust CO content until all possible fault causes have been checked and remedied.

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Remove seal.

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Switch off the engine

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Drill two 2 mm (0.079 in) holes in the plug.

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Pull out plug with circlip ring pliers.

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Start the engine and idle it.

Adjust CO Content

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Adjust CO content to 1%.

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Turning adjustment screw:

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clockwise reduces the CO content.

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counter-clockwise increases CO content.

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The adjustment range is 15 turns.

Checking Voltage

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Adjust CO content to 1%.

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Engine idling.

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Go into scrolling values.

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Read off CO potentiometer value. Diagnostic trouble code EFI-211 will be stored after 20 seconds if this value exceeds 4.8 Volts or is below 0.2
Volts
. This indicates that the engine is faulty. 

Maintenance > Tune-up and Engine Performance Checks > Air/Fuel Mixture > System Information > Description and Operation > Page 730

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