Assistance on "check Engine" codes P0725 & P0700

I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl, auto, this
weekend.
This is the second time this has happened.
Decel coming off the freeway, feels like a misfire, or problem W/trans
hanging in higher gear, then downshifting. Check engine light comes on and
car goes into limp mode.
Turn off the car for a while, check engine still on, but now running fine.
Went to Auto Zone and borrowed their code reader (thanks Auto Zone!) and got
1 P0725 - engine speed sensor and 2 P0700 ( forget the exact description)
something like transmission controller.
I'd like to fix myself but need some assistance.
Is there actually an "engine speed sensor" that can be replaced? Where might
it be?
Anybody else experience this problem? What did you do to fix?
Any and all topic related posts greatly appreciated!

--

Ralph Shapiro
Rohnert Park, CA 94928

Ralph Shapiro wrote:

> I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl, auto, this
> weekend.
> This is the second time this has happened.
> Decel coming off the freeway, feels like a misfire, or problem W/trans
> hanging in higher gear, then downshifting. Check engine light comes on and
> car goes into limp mode.
> Turn off the car for a while, check engine still on, but now running fine.
> Went to Auto Zone and borrowed their code reader (thanks Auto Zone!) and got
> 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact description)
> something like transmission controller.
> I'd like to fix myself but need some assistance.
> Is there actually an "engine speed sensor" that can be replaced? Where might
> it be?
> Anybody else experience this problem? What did you do to fix?
> Any and all topic related posts greatly appreciated!

You likely have a bad transmission input speed sensor - that would be
consistent with the codes and symptoms. A $15-30 part depending on
where you get it, and you can replace it yourself (put car up on
jackstands, crawl under car - screw old sensor out, new sensor in using
a 1" wrench - open end or socket - either may work, one may give better
accessibility than the other).

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

Thanks, Bill. I'll give it a shot.
"Bill Putney" > wrote in message
...
> Ralph Shapiro wrote:
>
>> I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl, auto,
>> this weekend.
>> This is the second time this has happened.
>> Decel coming off the freeway, feels like a misfire, or problem W/trans
>> hanging in higher gear, then downshifting. Check engine light comes on
>> and car goes into limp mode.
>> Turn off the car for a while, check engine still on, but now running
>> fine.
>> Went to Auto Zone and borrowed their code reader (thanks Auto Zone!) and
>> got 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact
>> description) something like transmission controller.
>> I'd like to fix myself but need some assistance.
>> Is there actually an "engine speed sensor" that can be replaced? Where
>> might it be?
>> Anybody else experience this problem? What did you do to fix?
>> Any and all topic related posts greatly appreciated!
>
> You likely have a bad transmission input speed sensor - that would be
> consistent with the codes and symptoms. A $15-30 part depending on where
> you get it, and you can replace it yourself (put car up on jackstands,
> crawl under car - screw old sensor out, new sensor in using a 1" wrench -
> open end or socket - either may work, one may give better accessibility
> than the other).
>
> Bill Putney
> (To reply by e-mail, replace the last letter of the alphabet in my address
> with the letter 'x')

"Ralph Shapiro" > wrote in message
...
> Thanks, Bill. I'll give it a shot.
> "Bill Putney" > wrote in message
> ...
> > Ralph Shapiro wrote:
> >
> >> I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl, auto,
> >> this weekend.
> >> This is the second time this has happened.
> >> Decel coming off the freeway, feels like a misfire, or problem W/trans
> >> hanging in higher gear, then downshifting. Check engine light comes on
> >> and car goes into limp mode.
> >> Turn off the car for a while, check engine still on, but now running
> >> fine.
> >> Went to Auto Zone and borrowed their code reader (thanks Auto Zone!)
and
> >> got 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact
> >> description) something like transmission controller.
> >> I'd like to fix myself but need some assistance.
> >> Is there actually an "engine speed sensor" that can be replaced? Where
> >> might it be?
> >> Anybody else experience this problem? What did you do to fix?
> >> Any and all topic related posts greatly appreciated!
> >
> > You likely have a bad transmission input speed sensor - that would be
> > consistent with the codes and symptoms. A $15-30 part depending on
where
> > you get it, and you can replace it yourself (put car up on jackstands,
> > crawl under car - screw old sensor out, new sensor in using a 1"
wrench -
> > open end or socket - either may work, one may give better accessibility
> > than the other).
> >
> > Bill Putney
> > (To reply by e-mail, replace the last letter of the alphabet in my
address
> > with the letter 'x')
>
>
More then likely as Bill said the input speed sensor. If you are going to
replace the input sensor you may as well get the output sensor also. They
are right next to each other and easy to get at.

Glenn Beasley
Chrysler Tech

Thanks, guys. Haven't spent any $$$ for the whole ownership of the car.
Guess its time to throw some to the auto gods.
"maxpower" > wrote in message
. ..
>
> "Ralph Shapiro" > wrote in message
> ...
>> Thanks, Bill. I'll give it a shot.
>> "Bill Putney" > wrote in message
>> ...
>> > Ralph Shapiro wrote:
>> >
>> >> I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl,
>> >> auto,
>> >> this weekend.
>> >> This is the second time this has happened.
>> >> Decel coming off the freeway, feels like a misfire, or problem W/trans
>> >> hanging in higher gear, then downshifting. Check engine light comes on
>> >> and car goes into limp mode.
>> >> Turn off the car for a while, check engine still on, but now running
>> >> fine.
>> >> Went to Auto Zone and borrowed their code reader (thanks Auto Zone!)
> and
>> >> got 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact
>> >> description) something like transmission controller.
>> >> I'd like to fix myself but need some assistance.
>> >> Is there actually an "engine speed sensor" that can be replaced? Where
>> >> might it be?
>> >> Anybody else experience this problem? What did you do to fix?
>> >> Any and all topic related posts greatly appreciated!
>> >
>> > You likely have a bad transmission input speed sensor - that would be
>> > consistent with the codes and symptoms. A $15-30 part depending on
> where
>> > you get it, and you can replace it yourself (put car up on jackstands,
>> > crawl under car - screw old sensor out, new sensor in using a 1"
> wrench -
>> > open end or socket - either may work, one may give better accessibility
>> > than the other).
>> >
>> > Bill Putney
>> > (To reply by e-mail, replace the last letter of the alphabet in my
> address
>> > with the letter 'x')
>>
>>
> More then likely as Bill said the input speed sensor. If you are going to
> replace the input sensor you may as well get the output sensor also. They
> are right next to each other and easy to get at.
>
> Glenn Beasley
> Chrysler Tech
>
>

Well, I've replaced both input and output trans. sensors, to no avail.
Problem still exists.
After searching the internet, I've also cleaned all grounds under the hood.
I checked the connector to the cam sensor ( at back of head), and found it
full of oil from a blown head gasket, so I cleaned that out.
Pulled the connector at the trans, it had trans fluid in it, cleaned that.
Took to a shop ( non dealer) for a diagnostic, they said may be crank
position sensor or TCM, but could not say for sure which was bad, or even if
this would fix.
Additional research said P0700 indicates that the TCM has to be queried for
more specific codes. Is this true, can the TCM have codes that can be read?
So, my additional question, could the TCM be bad? Any service bulletins on
TCM problems? Reflash the TCM ? Can codes be read from it that will indicate
more info on the problem?
Should I have an 'accident' to get rid of this car?

I also had the trans fluid changed in 3/05 at a non dealer. No description
of ATF+4 being used on the flush, but additive used. Did I shoot myself in
the foot on this? Getting the fluid changed again today.

"Ralph Shapiro" > wrote in message
...
> Thanks, guys. Haven't spent any $$$ for the whole ownership of the car.
> Guess its time to throw some to the auto gods.
> "maxpower" > wrote in message
> . ..
>>
>> "Ralph Shapiro" > wrote in message
>> ...
>>> Thanks, Bill. I'll give it a shot.
>>> "Bill Putney" > wrote in message
>>> ...
>>> > Ralph Shapiro wrote:
>>> >
>>> >> I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl,
>>> >> auto,
>>> >> this weekend.
>>> >> This is the second time this has happened.
>>> >> Decel coming off the freeway, feels like a misfire, or problem
>>> >> W/trans
>>> >> hanging in higher gear, then downshifting. Check engine light comes
>>> >> on
>>> >> and car goes into limp mode.
>>> >> Turn off the car for a while, check engine still on, but now running
>>> >> fine.
>>> >> Went to Auto Zone and borrowed their code reader (thanks Auto Zone!)
>> and
>>> >> got 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact
>>> >> description) something like transmission controller.
>>> >> I'd like to fix myself but need some assistance.
>>> >> Is there actually an "engine speed sensor" that can be replaced?
>>> >> Where
>>> >> might it be?
>>> >> Anybody else experience this problem? What did you do to fix?
>>> >> Any and all topic related posts greatly appreciated!
>>> >
>>> > You likely have a bad transmission input speed sensor - that would be
>>> > consistent with the codes and symptoms. A $15-30 part depending on
>> where
>>> > you get it, and you can replace it yourself (put car up on jackstands,
>>> > crawl under car - screw old sensor out, new sensor in using a 1"
>> wrench -
>>> > open end or socket - either may work, one may give better
>>> > accessibility
>>> > than the other).
>>> >
>>> > Bill Putney
>>> > (To reply by e-mail, replace the last letter of the alphabet in my
>> address
>>> > with the letter 'x')
>>>
>>>
>> More then likely as Bill said the input speed sensor. If you are going to
>> replace the input sensor you may as well get the output sensor also. They
>> are right next to each other and easy to get at.
>>
>> Glenn Beasley
>> Chrysler Tech
>>
>>
>
>

Ralph Shapiro wrote:
> ...I also had the trans fluid changed in 3/05 at a non dealer. No description
> of ATF+4 being used on the flush, but additive used. Did I shoot myself in
> the foot on this? Getting the fluid changed again today.

If they used an additive, there's a 99.9999% chance that they did not
use ATF+4. Most likely Dexron plus an additive. Can't say for sure if
it's your problem, but it's not good.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

did you disconnect the battery to erase the codes???
the computer will still be in limpin mode if you did not

Ralph Shapiro wrote:

> Well, I've replaced both input and output trans. sensors, to no avail.
> Problem still exists.
> After searching the internet, I've also cleaned all grounds under the hood.
> I checked the connector to the cam sensor ( at back of head), and found it
> full of oil from a blown head gasket, so I cleaned that out.
> Pulled the connector at the trans, it had trans fluid in it, cleaned that.
> Took to a shop ( non dealer) for a diagnostic, they said may be crank
> position sensor or TCM, but could not say for sure which was bad, or even if
> this would fix.
> Additional research said P0700 indicates that the TCM has to be queried for
> more specific codes. Is this true, can the TCM have codes that can be read?
> So, my additional question, could the TCM be bad? Any service bulletins on
> TCM problems? Reflash the TCM ? Can codes be read from it that will indicate
> more info on the problem?
> Should I have an 'accident' to get rid of this car?
>
> I also had the trans fluid changed in 3/05 at a non dealer. No description
> of ATF+4 being used on the flush, but additive used. Did I shoot myself in
> the foot on this? Getting the fluid changed again today.
>
> "Ralph Shapiro" > wrote in message
> ...
> > Thanks, guys. Haven't spent any $$$ for the whole ownership of the car.
> > Guess its time to throw some to the auto gods.
> > "maxpower" > wrote in message
> > . ..
> >>
> >> "Ralph Shapiro" > wrote in message
> >> ...
> >>> Thanks, Bill. I'll give it a shot.
> >>> "Bill Putney" > wrote in message
> >>> ...
> >>> > Ralph Shapiro wrote:
> >>> >
> >>> >> I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl,
> >>> >> auto,
> >>> >> this weekend.
> >>> >> This is the second time this has happened.
> >>> >> Decel coming off the freeway, feels like a misfire, or problem
> >>> >> W/trans
> >>> >> hanging in higher gear, then downshifting. Check engine light comes
> >>> >> on
> >>> >> and car goes into limp mode.
> >>> >> Turn off the car for a while, check engine still on, but now running
> >>> >> fine.
> >>> >> Went to Auto Zone and borrowed their code reader (thanks Auto Zone!)
> >> and
> >>> >> got 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact
> >>> >> description) something like transmission controller.
> >>> >> I'd like to fix myself but need some assistance.
> >>> >> Is there actually an "engine speed sensor" that can be replaced?
> >>> >> Where
> >>> >> might it be?
> >>> >> Anybody else experience this problem? What did you do to fix?
> >>> >> Any and all topic related posts greatly appreciated!
> >>> >
> >>> > You likely have a bad transmission input speed sensor - that would be
> >>> > consistent with the codes and symptoms. A $15-30 part depending on
> >> where
> >>> > you get it, and you can replace it yourself (put car up on jackstands,
> >>> > crawl under car - screw old sensor out, new sensor in using a 1"
> >> wrench -
> >>> > open end or socket - either may work, one may give better
> >>> > accessibility
> >>> > than the other).
> >>> >
> >>> > Bill Putney
> >>> > (To reply by e-mail, replace the last letter of the alphabet in my
> >> address
> >>> > with the letter 'x')
> >>>
> >>>
> >> More then likely as Bill said the input speed sensor. If you are going to
> >> replace the input sensor you may as well get the output sensor also. They
> >> are right next to each other and easy to get at.
> >>
> >> Glenn Beasley
> >> Chrysler Tech
> >>
> >>
> >
> >

Ralph Shapiro wrote:
> I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl, auto, this
> weekend.
> This is the second time this has happened.
> Decel coming off the freeway, feels like a misfire, or problem W/trans
> hanging in higher gear, then downshifting. Check engine light comes on and
> car goes into limp mode.
> Turn off the car for a while, check engine still on, but now running fine.
> Went to Auto Zone and borrowed their code reader (thanks Auto Zone!) and got
> 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact description)
> something like transmission controller.
> I'd like to fix myself but need some assistance.
> Is there actually an "engine speed sensor" that can be replaced? Where might
> it be?
> Anybody else experience this problem? What did you do to fix?
> Any and all topic related posts greatly appreciated!
>
> --
>
> Ralph Shapiro
> Rohnert Park, CA 94928

Don't try to diagnose a modern computer controlled car yourself. You
may get lucky and find the problem, once in a while, but very rarely.
The machine used to diagnose these new cars quickly and effectively
costs $40,000 I have a close friend I went to high school with, that
has one and is in the repair business. If you saw that machine work
and knew how complicated the engines controls really are, you would not
even bother trying to fix that car. Your problems with the car can be
a multitude of things.

The basic diagnosis procedure should always include fuel
pressure/volume, exhaust backpressure, and scan all the sensors. Then
the ignition and plugs and timing. Then the computer and proms are
checked. If the problem still is not found, then it may be an
electrical connection in the harnesses somewhere. Very rarely is it an
engine mechanical problem.

duty-honor-country aka Limp Dick Charlie Nudo wrote:
> Ralph Shapiro wrote:
> > I had some problems on my 98 Ply. Breeze, 63K Miles, 2.0L 4 cyl, auto, this
> > weekend.
> > This is the second time this has happened.
> > Decel coming off the freeway, feels like a misfire, or problem W/trans
> > hanging in higher gear, then downshifting. Check engine light comes on and
> > car goes into limp mode.
> > Turn off the car for a while, check engine still on, but now running fine.
> > Went to Auto Zone and borrowed their code reader (thanks Auto Zone!) and got
> > 1 P0725 - engine speed sensor and 2 P0700 ( forget the exact description)
> > something like transmission controller.
> > I'd like to fix myself but need some assistance.
> > Is there actually an "engine speed sensor" that can be replaced? Where might
> > it be?
> > Anybody else experience this problem? What did you do to fix?
> > Any and all topic related posts greatly appreciated!
> >
> > --
> >
> > Ralph Shapiro
> > Rohnert Park, CA 94928
>
> Don't try to diagnose a modern computer controlled car yourself. You
> may get lucky and find the problem, once in a while, but very rarely.
> The machine used to diagnose these new cars quickly and effectively
> costs $40,000 I have a close friend I went to high school with, that
> has one and is in the repair business. If you saw that machine work

Your story sounded legit until you got to the part about having a close
friend, that's when people realized it was total bull****.