I have an R motor in my hatch and for some reason when they installed my headers they didn't plug in my o2 sensor. It pops an engine light but seems to run fine (a little on the rich side) is it really that bad to be driving it. I just got it done like a week ago. What do you guys think?

 

youre running OBDII? try plugging in the second O2 sensor.

 

It is JDM motor so I think that there is only one o2 censor.