P0420 has not come back.
But P0130 showed up last week.
Went ahead and replaced upstream and downstream O2 sensors yesterday.
O2 sensors were original with 238k miles so they were due for replacement.
So far no CEL for the last 200 miles. __________________
1996 Ti 280k miles and still going....
1993 964 - holding on to this one
2001 Burban, 240k miles
2018 Suburban Z71
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