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Catalytic converter monitoring on lexus
This vehicle uses two af ratio sensors and one downstream oxygen sensor. With just one downstream oxygen sensor how can pcm determine which bank cat converter is failing? Thanks. Login to read more. 
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| Engine | 3.0 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1999 Lexus ES300 3.0L
| Engine | 3.0 L |
| Trans | 4-speed Automatic (Electronic) |
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