Question about 2003 Ford Expedition
You have to check everything on the list.
You have an O2 Sensor, trying to correct for a rich condition.
I don't have an hour, to type everything, from the Powertrain Control/Emissions Diagnosis Manual.
That doesn't mean you really have a rich condition,the O2 Sensor just thinks you do.
You need to work the list for the 2195,not the 2197
Most issues are due to vacuum leaks, including the ducting from air filter to throttle
Posted on Oct 05, 2010
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Posted on Jan 02, 2017
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