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Old March 11th, 2011, 20:49
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Ecomike Ecomike is offline
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Join Date: Dec 2006
Location: MilkyWay Galaxy
Posts: 15,300
Re: Testing Jeep O2, Oxygen sensors

I frequently forget to mention that people need to check for exhaust leaks, cracked exhaust pipes, and WHY!!!

The O2 sensor compares the exhaust gas O2 concentration to out door ambient air O2 concentrations, and if exhaust gas (which has low O2 levels) is blowing on the O2 sensor exterior from a crack or gasket leak, it can throw off the comparison measurements, and the computer will get miss led think the engine is running too lean, and add and waist fuel, even if the sensor is good and new!!!!!!!!
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