Thread: Permanent P0420
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Old 05-08-2017, 01:24 AM   #6 (permalink)
Alexwallace23
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Quote:
Originally Posted by bbermann View Post
Last month I got a PO430. Its for the other bank. I was running Berk HFCs I had bought used so I just bought a new set and that cleared it.

Never had a problem with the Berks and codes before that...either before or after tuning.
I really do not want to spend the money on new HFCs to troubleshoot this problem. I think this may be an O2 sensor issue. I say this because the permanent P0420 went away after a day. Codes P0430 and P0420 came up last weekend. So supposedly both HFCs are operating below the threshold, but once again, the codes went away after a day.

I assume if the HFCs were going bad the codes would always be there.

Last edited by Alexwallace23; 05-08-2017 at 01:48 AM.
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