MPV LX V6-2.5L DOHC (2000)
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If the ratio is less than 2, the WU-TWC is not functioning properly. Replace the WU-TWC.
Downstream HO2S Graphline Example 2
Equation
RATIO = 26 inversions (upstream HO2S inversions) + 7 inversions (downstream HO2S inversions) = 3.7 (good converter)
Downstream H02S Graphline Example 3
Equation
RATIO = 26 inversions (upstream HO2S inversions) + 19 inversions (downstream HO2S inversions) = 1.4 (bad converter)
