I installed my DC 4-1 headers, and I wasnt sure that I put the O2 sensor back in right.I just screwed it in and plugged it back in. When I turned my car on, the check engine light came on. I checked the code and it said it was a code 41 which is a Primary Oxygen Sensor - Heater circuit malfunction. Have any of you guys had this problem or know what to do?
thanks

 

O2 sensor

 

check the plug
99% chance its not all the way in

 

Did you reset the ecu after the header install?