I had after market headers with a CAI. They were R1 headers and AEM CAI. ANyway, i lowered my car and scrapped my headers. Had to put my stock headers back on. Now hte check engine light comes one. When I had headers and CAI, nothing came on. I went to Acura Dealer, they said that it was cuz of hte CAI? Is this common?

 

when i installed my headers my o2 sensor fell out, maybe that could be the problem. even after i fixed it my light was still on. just unplug the battery for awhile then plug it back in then turn on ur engine. the motor might rattle for awhile cuz it is adjusting,wait until it stops, then your light should be off.

 

reset your ecu take the negative off for 30 secs and put back on.

 

Try that, if it still does it then check for codes....