Pin 3 & 4 should be the heater circuit. If you did not replace it with an
OEM sensor you may need to get one. Many posts with 3rd party O2 sensors not
working on the Honda. Resistance should be 10-40 ohms. Should have battery
voltage on pin 4. From there you need to test the wiring harness, procedure
in the OEM service manual. An OBDII scanner can also be used to diagnose.

"lobo" <el_lobo@nowhere.net> wrote in message
news:C3uWl.31658$YU2.321@nlpi066.nbdc.sbc.com...
> Can't seem to get rid of this code as it keeps reappearing and have
> replaced the bank 1sensor . I have been trying to find what voltage
> readings I should have on the vehicle side plug to the 4 wire bank 1
> sensor as my manual does not seem to indicate that. I have 12 volts (key
> on-not running) on one of the unplugged heater pins to body ground but not
> on the other. I am thinking I should have 12 volts on both?
>
> Thanks in advance,
> Ray
>
> 1999 Accord
> F23A1
>
>