What Causes A Po420 Code

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P0420 2008 TOYOTA CAMRY - Catalyst System Efficiency Below Threshold

Causes and Fixes Toyota P0420 Code: Catalyst System Efficiency Below

What causes a po420 code: catalyst efficiency below threshold?

What causes a po420 code: catalyst efficiency below threshold?

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What causes a po420 code: catalyst efficiency below threshold?

P2097 – Post catalytic converter fuel trim (FT), bank 1 – too rich