P0420 DTC and my Gen 2 2009 Prius with Aftermarket Cat

27 Oct 2024 1 min read No comments Toyota Prius Maintenance
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If anyone is curious… this is the O2 sensor spacer I used. I was getting a P0420 Prius Code.

P0420 Prius

Well, that one didn’t work… the error code did stay away longer but it wasn’t until I put a 90 degree bend extension on did they DTC code stop triggering the CEL.

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