Code 13 need help.
I installed long tube headers about two weeks ago along with an ory. I ended up getting the ses light, so I scanned the code and it was code 13 which is open circuit on bank 1 for 02 sensor. I was wondering what exactly that meant. Does it mean i need a new 02 sensor, or is there a leak, or do i just need a tune for my car, which i plan on getting next week. Any help would be appreciated.
94 Trans am GT A4: CAI, intake elbow, 160 thermostat, boxed LCA, full poly bushings, !AC, TB bypass, flowmaster 3in dual exhaust, ory, pacesetter longtube headers, !AIR, !CAT, !EGR, subframe connectors, ZR1 wheels.