I'm getting the P1131 code, fuel air metering (O2 sensor) CEL after a UIM/LIM rebuild. I cleared the code and it came back within 10 minutes. When I was replacing the rear valve cover gaskets, I disconnected the O2 sensor connector in order to maneuver the wire harness back more. When I reconnected it, I used some electric cleaner for the terminals. I am thinking that this could have caused the O2 sensor to malfunction. I checked everything else and all else is connected properly. Do I need a new O2 sensor?
