> wrote in message
...
>I have a 2001 Chrysler Town and Country Limited (3.8 L) with 122K
> miles on it. A few months ago the check engine light came on and
> there where three codes 1684 (battery disconnect) , 1491 (radiator fan
> relay) and 0135 (O2 sensor). Two weeks ago I replaced both O2
> sensors. After driving the car for a few miles the check engine light
> went off. A couple of days ago it came back on and the same three
> codes are back.
>
> Are the O2 sensor I put in bad or is something else wrong?
>
> Thanks in advance,
>
> Derek


The P0135 code is O2 sensor heater circuit - bank 1 sensor one. You did
check the heater circuit before you replaced the sensor, right ????