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Was getting P1147 only on 2002 Infiniti I35, Changed O2 sensor, and now getting P0420

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Was getting P1147 only on 2002 Infiniti I35, Changed O2 sensor, and now getting P0420 PD, no light.

Vehicle: 2002 Infiniti I35

2 Answers

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the catalyst converter needs to be replaced
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P0420 INFINITI - Catalyst System Efficiency Below Threshold Bank 1

Read more: https://www.autocodes.com/p0420_infiniti.html

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