I took off the header off my GSR today and saw the new header wouldnt bolt up so i put the header right back on. Didnt remove the o2 sensor just unpluged it and removed the header, Put the header back and pluged my o2 sensor back and now my engine light is on.

Happen to anybudy before?

 

Did you try resetting your ecu?

 

not sure how to do that.

 

Unplug your battery, let it sit a few seconds.

 

unhook your battery and rehook it back up.

 

yup did that. did nothing.