Mike's Workshop Manuals
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1994
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90 CS Quattro
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Repair and Diagnosis
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Engine Controls - Tests W/Codes
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Self-Diagnostic System
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Reading Individual Measuring Values (ECM "A")
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Channel 00, Oxygen Sensor Control Factor For Cyls. 1-3
Channel 00, Oxygen Sensor Control Factor For Cyls. 1-3
If average value is not 128 (range of 120-136), adjust CO level.