I replaced the upstream O2 sensor (passenger side) on
my 2001 4.7 Dak in July due to an O2 sensor code. I
used a Bosch universal replacement,but I left about a
foot of the new sensor's wires (I made my connections
well away from the sensor). It took care of that
code,but I've had a P0442 code for a loose gas cap
since about a week after I changed the sensor.
Replaced gas cap with new OEM part,still have the
code. Is it possible that I'm getting a gas cap code
because of the 02 sensor not being a stock
replacement?
Thanks!
Steve P.
--- "Bernd D. Ratsch" <bernd@dodgetrucks.org> wrote:
>
> The way an O2 sensor works is this: There's either
> an air intake in the
> body, top or the sensor, or harness. Air is sampled
> through the intake and
> resistance changes. O2 sensors don't check for
> fuel...they check for air
> (O2). The harness does contain wires (obviously),
> but the clearance inside
> the harness can be "loose" to allow air to travel
> through it - four wires
> can have enough clearance in the harness for the air
> to be sampled. About
> 80% of the sensors use the body (which is why you
> don't want to get them
> caked full of mud, oil, road tar, etc).
>
> Remember: Fuel is NOT checked by the O2
> sensor....AIR is. (Lack thereof or
> abundance)
>
> - Bernd
>
> -----Original Message-----
> From: Zito, James A (GE Infra, Energy)
> [mailto:james.zito@ge.com]
> Sent: Thursday, October 04, 2007 7:53 AM
> To: Dakota list (E-mail)
> Subject: DML: RE: Replacing O2 sensors on 2001 3.9L
> V6
>
>
>
> >From Bernd:
>
> Stay away from "universal" O2 sensors that require
> you to cut/crimp your old
> connector into the new one. Reason for this is that
> the newer style O2
> sensors use the wires as an air passage for O2
> measurements. Plug it and
> you'll get either incorrect readings or a check
> engine light.
>
>
>
> HUH?? I just can't visualize what you're trying to
> say here. To paraphrase
> Curly Howard, Hey Moe them wires is full of
> copper!!! So how does air get
> down them? Also is it using this mysteriously
> penetrating air as some sort
> of a reference or what?
>
> Jim
> universal Bosch O2 sensor on his 03 Dak that is
> missing 2 pistons
>
>
>
>
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