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Changed O2 Sensor, now 'Check Engine' light will not go off 200 1991

posted by  southern fried volvo on  Tue Oct 29 17:47 CST 2002
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last visit: Thu Dec 19 00:38 CST 2013
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I changed the O2 sensor on a 1991 240 over the weekend. Instead of replacing it with an OEM 3-wire sensor ($120), I crimped on a single-wire unit (Bosch part #11027, $17.99). Everything was fine for 120 miles, then the "Check Engine" light came on. I disconnected the battery to reset the warning light, and rechecked everything. After driving another 3-5 miles, the light came back on. This keeps occurring whenever I reset the light.

Any suggestions? Did I get the wrong part? Is a 3-wire sensor necessary? (In this region, the temperature seldom reaches freezing point for more that a few days during the winter.) Should I solder the new sensor wire, insted of crimping it?

[[ southern fried volvo '91 240 120k mi ]]






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New Changed O2 Sensor, now 'Check Engine' light will not go off [200][1991]
posted by  southern fried volvo subscriber  on Tue Oct 29 17:47 CST 2002 >


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