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AutoZone associate using code reader to diagnose CEL P0449

P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

Getting P0449 on your scan tool? Learn what this code means and what to do about it.

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P0420: Catalyst System Efficiency Below Threshold

P0420: Catalyst System Efficiency Below Threshold

Seeing P0420 on your code reader? Learn some common causes and solutions for this issue.

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