95 f150 5.0 maf 5speed, truck runs good till it warms up (goes into closed loop) cel comes on and sometime sluggish throttle, koeo and koer codes I get are 172 and 173 no vacuum leaks, checked all other sensors and fuel pressure so im thinking o2 sensor, its original with 239,000+ miles on it

 

I'd say you got your moneys worth out of 'em.

Adrianspeeder

 

LOL yes I did