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Old 02-18-2021, 04:24 PM   #31
blue62
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Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,297
Quote:
Originally Posted by porschefan76 View Post
Hello and thanks for the follow-ups. Yes, I intend to back pressure test for failing cats when the weather cooperates, probably early this upcoming week. As far as I can tell however, the post-cat O2 sensor does not play with the ECU, so I don't think that could be causing the P1126, but maybe if the cat is failing, that could cause it?

I'll add results as soon as I perform the test. Thanks for the continued interest and inputs!
Agree your P1126 is another issue.
Perhaps some form of vacuum leak.
Or MAF sensor but there are ways to test it.
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