Question about 2002 Ford Mustang
We just replaced the upper O2 sensor in my son's 91 Camaro. Before we replaced the sensor the code read it was running rich, now it reads it's running lean. Did we miss a sensor downstream? Could it be that the sensor we just installed is bad?
There should be an O2 sensor on each side near the top just below where exhaust pipe meets exhaust manifold. The one on the passenger side is a little hard to see and get at.
Posted on Oct 28, 2011
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Posted on Jan 02, 2017
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