O2 sensor location

1998 FORD CONTOUR
138,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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DEREK LENTZ
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  • 1 POST
I need to replace the upstream sensor. as they both appear to be before the catalytic converter, which one is the upstream?
Sep 19, 2017 at 11:22 AM
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MHPAUTOS
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the up stream sensor is the first one in line.
Sep 20, 2017 at 4:30 AM