I had a CEL last week for the primary o2 sensor heater so I replaced it. the cel went our but now i notice that it will randomly come on after i have been driving for a few minutes. if i turn off the car it will go away when i turn it back on. what could it be? i used a denso universal

 

i heard aftermarket o2 sensors will do something like that.
i bought a new honda one for 200 and no problems or CEL.

 

so you think that one just rolled off the line bad? i'll try another. i hope it dont get stuck and break off like the last one

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ninety5Ex &raquo;</TD></TR><TR><TD CLASS="quote">so you think that one just rolled off the line bad? i'll try another. i hope it dont get stuck and break off like the last one</TD></TR></TABLE>

haha.. not good. nah i doubt its just one that's bad. i meant in how its made and manufactured that makes aftermarket o2's bad.