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90 760 turbo O2 sensor system code problem - help 700 1990

posted by  mapleleafer on  Wed Oct 19 19:14 CST 2005
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last visit: Wed Oct 9 00:36 CST 2013
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The idle would change when you create a vacuum leak, whether the O2 sensor is good or bad. Not only should the sensor be generating a voltage based on oxygen content, but it needs to react quickly. The mixture has to rapidly switch between a slight excess of O2, required by the catalyst to oxidize the exhaust and excess of CO2 for reduction. Without using a voltmeter or o-scope, you cannot properly check sensor performance.






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