I have a 91' Civic Si and the CEL comes on after driving the car a little bit. According to the flashes, its codes 1 and 10, oxygen content and intake air temp. What does this all mean? It idols fine so I don't believe its a vacuum leak, but could that still be the case? What is the most likely problem/ solution? Thanks.

 

Anyone have any ideas?

 

45 views and no opinions?

 

Maybe you o2 sensor and the plug on the intake runner is the iat (intake air temp) start there.

 

Code 1 is definitely you needing to replace the O2 sensor. Take care of that first and see if you still get Code 10.

 

Ok, cool. I just replaced the o2 not too long ago, maybe I got a bad one. I still have my old o2 that was still good, so I'll swap them and see how that goes.