liljoe07
5 Year Member
This 91 has been here the whole time, through both Computers, so It actually lean, or the 02 is bad. What you can do is, take the 02's out and swap them around in the H-pipe.....Driver side to passenger side and pssenger side to driver side. Then Run the KOER test again, if Code 41 shows, then the 02 is bad, if code 91 is still there, then its in the wiring or an real Lean condition.
Note: dont move the harness with the 02. Actually un plug the 02 from its connector, then swap sides on the H-pipe or what ever is down there, then Plug them back in and code test.
Note: dont move the harness with the 02. Actually un plug the 02 from its connector, then swap sides on the H-pipe or what ever is down there, then Plug them back in and code test.