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Home >> Mazda >> 2004 >> MPV ES >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Emission System >> Warm-Up Three-Way Catalytic Converter (WU-TWC) Inspection >> Downstream HO2S Graph Line Example 3
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Downstream HO2S Graph Line Example 3

Equation 

RATIO = 26 inversions (upstream HO2S inversions) divide 19 inversions (downstream HO2S inversions) = 1.4 (deteriorated WU-TWC) 

Fig 1: Downstream HO2S Graph Line Example 3
G00993733Courtesy of MAZDA MOTORS CORP.
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