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Check Engine Light - O2 Sensor? 200 1989

posted by  someone claiming to be Joe Doniach on  Thu Nov 23 09:27 CST 2000 [RELATED]

Our 1989 240 (130K miles) started idling roughly and hesitating during low speed acceleration, as if the idle mixture is too lean. It still runs well at cruise. The "check engine" light came on, and the diagnostic codes are 1-1-3, 2-2-1, and 2-3-1. The fault code page posted in the FAQ section on this site leads me to suspect the oxygen sensor, but I don't want to just replace a $165 part without first testing it. Until this problem, the car ran very well, and I had last replaced the spark plugs and filters about 6 months ago. My questions are:

1. Is the O2 sensor the most likely problem? If not, what else might be the problem?

2. Is there any way to test the O2 sensor? Ohmmeter? Bypass it with a jumper wire to see if there is any difference in the way the car runs?

3. Any other suggestions?





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New Check Engine Light - O2 Sensor? [200][1989]
posted by  someone claiming to be Joe Doniach  on Thu Nov 23 09:27 CST 2000 >


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