o2 sensors

  1. J

    2019 Expedition Check Engine Light

    Hello I have a 2019 Expediton Limited with 93k miles and my check engine light has been coming on for the last 2 weeks. Changed the 4 O2 sensors and the cat convertor. 1 day after picking my car up the check engine light has come back on. After spending over $5k my husband doesn’t want to sink...
  2. H

    Rough running / misfiring?

    Hey folks, I would appreciate any advice. My 2007 has been running rough. My first attempt at remedy was replacing spark plugs and coils. The truck ran great for a few days then the problem returned as if I had done nothing. I saw o2 sensors mentioned somewhere along the journey of trying to...
  3. Engine1s26

    O2 Sensors

    2000 with a 5.4 only trouble codes are for all 4 O2 sensors. All for have been replaced but still getting the same codes. Scan tool shows the sensors are reading but the readings are erratic and jump all over and the mili amps are 0. Any ideas what might be the cause?
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