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Old 09-01-2005, 03:20 PM
Mar10K Mar10K is offline
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Join Date: Aug 2005
Posts: 16
Not that I'm surprised - but I got a Check Engine light in the middle of a highway trip. The good thing is it's a different one than I've gotten before:

P0133 - Sensor Circuit Slow Response (Bank 1 Sensor 1)

I guess that means I have an old O2 sensor. I've reset the DTC to see if I get the same code again, since the O2 sensor seems to be responding when I pull up the reading on a graph. I'm a bit surprised it's this one, since the Bank 1 Sensor 2 reading does not change much, and I would have thought it was the bad one.

Do these things just get old and have to be replaced? 1987 MB has 90k miles.
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