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Old 07-26-2016, 03:41 PM   #7
Frodo
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Join Date: Mar 2007
Location: Ohio
Posts: 1,997
Quote:
Originally Posted by LEJ View Post
At 62000 miles I got a Check engine light telling me that the O2 sensors were "aging" Cleared the code and got it again. The code was for a specific O2 but I went ahead and bought 4 and replaced them all. No more Check Engine Light issues. You indicated that you have 86,000 miles, I suspect your 02's are also "aging"
With similar provocation I replaced just the 2 post-cat O2 sensors at 53k miles. That resolved my then-current CEL problems until (7k miles later) we installed the headers.

I hate to randomly replace all 4 of them when I'm pretty sure at least part of my problem is the headers. They're not exactly dirt cheap! Is there any way to actually check whether an O2 sensor is in good shape or not??
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