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Old 06-28-2025, 05:32 AM   #4
blue62
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Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,309
Quote:
Originally Posted by njonesn View Post
Need to remove them and try to clean them however 2000 2.7 Boxster.
MAF is suspect, I have another on the way.

At idle the oxygen sensor voltage on both (pre-cat, no post cat on this model), drifts out of the 0.2 - 0.8 volt range.
Could one or both be faulty?

I'm trying to trace a rough idle and 'smell' or rich running.

Voltage snapshots over a few seconds.

Bank 1: 0.14, 1.00, 0.96, 0.15
Bank 2: 0.82, 0.08, 0.25, 0.82

Thanks.
O2 sensor readings at idle are rather meaninless...
The car is not driven at idle.
Very very few engine running tests are done at idle.
Proper testing of O2 sensor operation is done at cruise rpm.
Go to youtube and look up "scanner Danner" find his O2 sensor video.
He shows the proper way to test O2 sensors.
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