O2 sensor keeps fouling and throwing a code 26
#1
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O2 sensor keeps fouling and throwing a code 26
My 95 4runner with the 3.slow keeps getting slower. I replaced the O2 sensor and it works fine for a while till the sensor gets covered with "soot" and throws the code 26 (gas/air ratio rich). I clean it and it runs great till it fouls again. I do get a little white smoke when I start her and burns a little oil over time. Valves? Any idea what may be fouling the sensor???
#2
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White smoke may be the normal condensation symptom. If it smells like coolant, though, then there's an issue.
Could be the valve seals and/or rings are wearing out. Check the PCV valve for blow by. There's numerous other possibilities for an off fuel/air ratio, but start there first and rule things out one by one.
Could be the valve seals and/or rings are wearing out. Check the PCV valve for blow by. There's numerous other possibilities for an off fuel/air ratio, but start there first and rule things out one by one.
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My coolant levels are fine so I doubt its the head gasket. I'll check the valves and rings for leaking, can't think of anything else that would cover the the o2 sensor with "soot"?!?
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