1997 Mercury Grand Marquis Oxygen Sensor May Fail

One or more oxygen sensors may fail resulting in illumination of the Check Engine Light .

Affected Model Years

This issue affects Mercury Grand Marquis model years 1992, 1997, 1999, 2000, 2002, 2005, .

27 people reported this problem

  • 1997 149,000 Miles
    Were are the sensors. Located

  • 1997 140,000 Miles
    slow to accelerate, runs rough, horrible gas mileage. Hooked it up to system and received engine error code p0171 and po174 cylinder bank 1 and 2.

  • 1997 89,321 Miles
    The check engine light came on and the car runs rough on starting an accelerating and horrible gas milage. When checked came up oxygen sensors needed to be replaced.

  • 1997 170,000 Miles
    Check engine light has been on and won't shut off because I need to replace my o2 sensor. I plugged my car in at o'Reillys auto parts and it told me I need to replace O2 sensor

  • 1997 265,000 Miles
    check engine light turned on and car was shaking at a light or when driving. Haven't yet fix the problem

  • 1997 75,000 Miles
    check engine light poped on was told by auto-zone it was an o2 sensor

  • 1997 0 Miles
    Gas cap broke and we rode about 10 miles to get new one then check engine light came on started blinking and car started skipping not fixed yet