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O2 Sensor check question 200 1993

posted by  vvpete on  Thu Jan 17 07:58 CST 2008
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last visit: Thu Jul 10 14:10 CST 2014
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The correct test for the sensor is measuring voltage on the sensor wire while plugged in and the car running after warm-up. It should read 0.4 to 1.1 volts and fluctuate or 'hunt' in a cyclic manner, up and down. When you first start the car up cold it will read 0.8-0.9 volts and hold steady until it warms up then will start to flucuate.
Reading voltage or resistnce while unplugged won't tell you anything of significance.
--
'89 245 sportwagon, destroyed by hit & run driver, RIP. '04 V70 2.5 T Sportwagon, 12k mi and '91 245 5-speed, 209k mi, replaced the '89






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New O2 Sensor check question [200][1993]
posted by  Mark Lundell  on Thu Jan 17 06:05 CST 2008 >


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