Question about 1993 Saturn SL2
HO2S Bank 1 Sen 1 Insuff. Switching
What is this telling me?
It is telling you the fuel system is not seeing any closed loop switching, the signal from an O2 always varies between rich and lean, back and forth, you can have 3 things going on, one the O2 is lazy or has failed, but most times that would trip a lean code, the more likely cause is a problem in the fuel control, either to rich or to lean. without the actual voltage readings from the O2 it is hard to tell you what to replace, do you have a system monitor tool?
Posted on Aug 31, 2008
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