Question

What is the most likely cause of the following codes? P0420, P0440, P0442, and P0446 Emission Testing Fail

Answer 1

P0420 TOYOTA Code - Catalyst System Efficiency Below Threshold Bank 1
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P0440 TOYOTA Code - Evaporative Emission Control System Malfunction
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P0442 TOYOTA Code - EVAP System Small Leak Detected
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P0446 TOYOTA Code - EVAP System Vent Control Circuit
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