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O.S.---2.7 ohms cold and 5.5 ohms hot 200 1990

posted by  jdl on  Wed Sep 7 04:05 CST 2005
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last visit: Mon Feb 6 11:55 CST 2012
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My '90 240 is having rough idle problems, so when I read a post about measuring oxygen sensor resistance, I checked the resistance on O.S. leads and got 2.7 ohms cold and 5.5 ohms hot. The post indicated it should reach 12ohms/hot. Does that mean my O.S. is shot?
Also, got .55 volt at +heater wire (ign. on or off and wire connected or not). The post said 12v. was correct. What could account for the difference? Thanks.






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New O.S.---2.7 ohms cold and 5.5 ohms hot [200][1990]
posted by  jdl  on Wed Sep 7 04:05 CST 2005 >


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