Check engine light with O2 codes after both sensors have beenreplaced
 

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

Check engine light with O2 codes after both sensors have been replaced
 

> 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 ????

Check engine light with O2 codes after both sensors have beenreplaced
 

On Apr 25, 10:42 am, "Mike" > wrote:
> > 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 ????

Uhhhh -seeings as how I don't know what you are talking about the
answer is clearly no :).

How do you 'check the heater circuit'?

Check engine light with O2 codes after both sensors have been replaced
 

> wrote in message
...
> On Apr 25, 10:42 am, "Mike" > wrote:
>> > 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 ????
>
> Uhhhh -seeings as how I don't know what you are talking about the
> answer is clearly no :).
>
> How do you 'check the heater circuit'?

You need to check for power and ground on the wires going to the O2 heater.
You will need a wiring diagram and a multi-meter to check for power and
continuity. You could check all the fuses as the power to the heater should be
on a fuse. I don't know which fuse it would be but just check them all and
replace any that are blown.