Protege DX L4-1.6L DOHC (2000)
Downstream HO2S Graphline Example 1 - 3
11. Using the following equation, calculate the value of ratio.
Equation
RATIO = Upstream HO2S inversion / downstream HO2S Inversion
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If the ratio is 2 or more or no downstream HO2S inversion, the WU-TWC is functioning properly.
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If the ratio is less than 2, the WU-TWC is not functioning properly. Replace the WU-TWC.
