O2 Sensor | Ford Escort Owners Association (FEOA)
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O2 Sensor

Discussion in '2nd Gen 1991-1996 1.8L DOHC' started by joeselb, Sep 26, 2004.

  1. joeselb

    joeselb Guest

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    Can anyone tell me what would be a sign when O2 sensor is going bad ?
    Thanks in advance.
  2. escortlx96

    escortlx96 Guest

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    Do you have your check engine light on?Are you losing gas mileage?
  3. mp3scort

    mp3scort Guest

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    if you are losing gas mileage, power, or have a MIL, (Check Engine Light(MIL = Malfunction Indicator Light)). a good rule of thumb is if your car is older than 1990, change every 45,000 miles, 91-96, every 60,000, and 97 and up 100,000.
  4. joeselb

    joeselb Guest

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    Yeah, the Check Engine Light came on today. I've checked and gone over the vacume lines, seems to look good. When I have time from work tomorrow or sometime this week, I'll head to Auto Zone, and have them run a check.
  5. highanddry

    highanddry Guest

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    The most common cause for any vehicle's check engine light to come on is a failing/failed O2 sensor. They've got a tough job to do; it's hot in there. Other than your CEL/MIL illuminating, you may not notice any symptoms (poor fuel economy, loss of power) at all.

    If your CEL is coming on 5-10 minutes after you start the car, I'd bet on your O2 sensor. Very easy to replace; just use lots of penetrating oil.

    My truck's CEL automatically comes on every 145,000 km to remind me to change it. Sounds like a good idea, eh :idea: ? The problem is you have to pull the cluster to reset it :!: .

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