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Thread: 2002 Dodge Ram 1500 5.9L had a P0420 code. Replaced catalytic converter. Now O2 code.

  1. 05-28-2021 #1
    lastalgonquin
    lastalgonquin is offline
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    2002 Dodge Ram 1500 5.9L had a P0420 code. Replaced catalytic converter. Now O2 code.

    Replaced catalytic converter. The P0420 code is gong but now Im getting an Oxygen sensor heated catalyst code. Do I need to replace that now? I never saw this code before, only the P0420 code. Do I just need to drive it more ?
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  2. 05-31-2021 #2
    mustangmike351c
    mustangmike351c is offline
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    the heater in the sensor should read around 10 ohms +/- Probably damaged during the install.
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