Jeep Patriot P Codes (Powertrain) P0400 - P0499

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Constant P0420 Code?

2013 JEEP PATRIOT
Cat Code Keeps Popping Up, I Have Replaced The Spark Plugs, Map Sensor, Air Filter, And O2 Sensors. Codes Keep Popping Up, But I Don’t...
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Asked by Sich18

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