These indicate the O2 sensors are pegged (too rich)... Anyone have suggestions as to the problem? or is it as simple as replace the O2 sensors?

 

doubtful both O2's went bad at the same time.

do a search on here, Many people have had those same codes

 

I did a search and didn't get any concrete pointers (even found your thread ) I'll go with the regular suspects and start cleaning up stuff.

 

I have codes po174 & po171 I was told o2 sensors also system lean but i have yet gotten any real answers as to what they really mean look like im going to have to go to the dealer

 

I had the 171 and 174 and even with chip adjustment couldnt get them to stop coming back..Do you have an aftermarket exhaust?? we knew I had an exhaust leak and pin pointed it..Tightened and it hasn't came back on since..

 

no i have stock exhaust system