Car was throwing a code 13 so I went ahead and replaced both oxygen sensors. I disconnected the battery for half an hour and when I restarted it the code came back..... I've got longtubes without heated O2s but the cars been that way since I've owned it, and it always ran fine/no codes. I checked the wires and they seem fine (although the driver's side goes into the trans tunnel so I can't see part of it. I'm stumped Any ideas?

 

well, code 13 says O2 circuitry. i'd guess that it is like the code 43. it goes off when it senses the wire or the sensor not having enough resistance or voltage. I'd guess that the code 63,64,and 65 and for actual O2 fault. make sure all of your connections are secure and the prongs are'nt bent. check the wires and make sure they aren't cut up or burnt. last, check where they go into the harness. i have the same issue with my code 43. i have the code, but my knock sensor and wires read full resistance and voltage. i'm stumped, so i diasbled it. good luck

 

Yeah I've been searching the wiring harness for problems but haven't found anything yet

The SES light actually went away for a few minutes of driving today