Quote:
Originally Posted by jtlinna3vze
not sure why eveyone thinks o2 sensors last so long.. while they may not throw a code or light.. they start becoming inaccurate at around 60K. the college in my town, Michigan Tech University, one of the top three engineering colleges in the country.. they did i study on emissions control systems for DaimlerChrysler. nine times out of ten at around 60K miles o2 sensors were causing a average ten percent increase in emissions and a five to eight percent increase in fuel consumption. obviously this was with one brand of cars.. cant imagine its any different with any other..
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I guess ...before they light the MIL of course they degrade somewhat
I sure accept they degrade, both external contamination,
(exhaust crud internally, and grease and dirt externally on the ports)
and slow degradation of the element which is a factor of time
at working temperature (molecules at a time)
for best efficiency, yeah change them often.
to pass inspection, change when they trigger I/M not ready, or light up MIL