I have a reading of 1.275v. Constant

Asked by RickyV815 Jun 14, 2018 at 01:54 PM about the 2000 Ford Explorer XL

Question type: Maintenance & Repair

Trying to diagnose and intermittent rough idle and
lean condition. Upon hooking up my scanner, I'm
reading a 1.275v constant reading of O2S22.
Showing flatline on graphical view.  Can anyone
help me identify issue?? Trouble  codes are:
P0171-P0174

1 Answer
73,400

OJ answered 5 years ago

Check the O2 sensors with a multi meter. Crawl under the vehicle and determine how many wires are going to the sensor. Then search the net for articles or videos on how to check O2 sensor with multi meter. Limit your search to those sensors having the same number of electrical connections as on your vehicle.

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