
Cat efficiency in downstream O2 sensors
Greetings all, I'm writing this in response to Steve
Wootton's Tech help request today concerning his 05 Jeep
Liberty 3.7L oxygen sensors. He was stating that even after
replacing the catalytic converters and the downstream oxygen
sensors 5000 miles previous, that the Downstream sensors
weren't fluctuating like he thought they should. What I got
from that was, I think he was saying he thought that they
should be fluctuating more like the Upstream ones? Should
they be more constant if the catalytic converter is doing
their job. I didn't quite understand that and I wanted to
clarify this and I was wondering if anybody had any comments
on that. Doug.
Doug Foote ![]()
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