bad o2s?

[T man]

would the check engine light go on in the mark if any of the 02 sensors were bad?

i've been reading in some other forums that 02s should be changed every 100k miles. Could this cause a lean condition and a stumbling idle?

 

[logres]

Only if they are faulty enough...the ECM is not sensative at all when it comes to the O2 sensors. O2 sensors can be really bad without a CEL.

I would agree with the 100k rule...some people even use a 75k rule.

 

[jonrgonzalez]

my check engine light came on (98 mark)...had codes checked & it said o2 sensors...among other things later..