'02 300M: Code P0700 and...

Discussion in 'Chrysler 300' started by Percival P. Cassidy, May 26, 2008.

  1. 1. Check Engine light on again. At first I assumed it was P0441 again,
    but I checked and found it was P0700, which I understand is a somewhat
    general "Automatic Transmission Fault" message. Pulled the fuses for the
    computer and left them out for a while, and the vehicle ran for a couple
    of miles before the CEL came on again and the transmission shifted down.
    "Argh! Limp mode!" I thought, but I found that it *will* shift up from
    2nd but only at a higher-than-normal speed.

    2. The Climate Control display is blank. The fuses all seem to be OK.
    All the CC controls seem to work OK, but there is no display.

    Is there any one fault that could account for *both* these problems?

    The transmission problem seems most likely to be a sensor failure, from
    what I have read, but where do I look for the cause of the blank CC display?

    Perce
     
    Percival P. Cassidy, May 26, 2008
    #1
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  2. On 05/25/08 09:24 pm I wrote:

    > 1. Check Engine light on again. At first I assumed it was P0441 again,
    > but I checked and found it was P0700, which I understand is a somewhat
    > general "Automatic Transmission Fault" message. Pulled the fuses for the
    > computer and left them out for a while, and the vehicle ran for a couple
    > of miles before the CEL came on again and the transmission shifted down.
    > "Argh! Limp mode!" I thought, but I found that it *will* shift up from
    > 2nd but only at a higher-than-normal speed.
    >
    > 2. The Climate Control display is blank. The fuses all seem to be OK.
    > All the CC controls seem to work OK, but there is no display.
    >
    > Is there any one fault that could account for *both* these problems?
    >
    > The transmission problem seems most likely to be a sensor failure, from
    > what I have read, but where do I look for the cause of the blank CC
    > display?



    The Climate Control display has come back to life. I'm going to check
    the transmission fluid level with the fluid warm. Cold and engine off
    it's fine.

    Perce
     
    Percival P. Cassidy, May 26, 2008
    #2
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  3. Mike

    Mike Guest

    "Percival P. Cassidy" <> wrote in message
    news:zio_j.47$p%...
    > 1. Check Engine light on again. At first I assumed it was P0441 again, but I
    > checked and found it was P0700, which I understand is a somewhat general
    > "Automatic Transmission Fault" message. Pulled the fuses for the computer
    > and left them out for a while, and the vehicle ran for a couple of miles
    > before the CEL came on again and the transmission shifted down. "Argh! Limp
    > mode!" I thought, but I found that it *will* shift up from 2nd but only at a
    > higher-than-normal speed.
    >
    > 2. The Climate Control display is blank. The fuses all seem to be OK. All
    > the CC controls seem to work OK, but there is no display.
    >
    > Is there any one fault that could account for *both* these problems?



    No, you have two seperate problems.


    > The transmission problem seems most likely to be a sensor failure, from what
    > I have read, but where do I look for the cause of the blank CC display?
    >
    > Perce



    The P0700 code indicates a problem with the trans. You will need a scan tool
    capable of communicating with the trans computer to determine what the exact
    trans failure code is. A common failure seems to be the input and/or output
    speed sensor failure. Don't just throw parts at it, have it scanned so you can
    find out exactly what the problem is.
     
    Mike, May 26, 2008
    #3
  4. Mike

    Mike Guest

    "Percival P. Cassidy" <> wrote in message
    news:C9F_j.24$...
    > On 05/25/08 09:24 pm I wrote:
    >
    >> 1. Check Engine light on again. At first I assumed it was P0441 again, but
    >> I checked and found it was P0700, which I understand is a somewhat general
    >> "Automatic Transmission Fault" message. Pulled the fuses for the computer
    >> and left them out for a while, and the vehicle ran for a couple of miles
    >> before the CEL came on again and the transmission shifted down. "Argh! Limp
    >> mode!" I thought, but I found that it *will* shift up from 2nd but only at
    >> a higher-than-normal speed.
    >>
    >> 2. The Climate Control display is blank. The fuses all seem to be OK. All
    >> the CC controls seem to work OK, but there is no display.
    >>
    >> Is there any one fault that could account for *both* these problems?
    >>
    >> The transmission problem seems most likely to be a sensor failure, from
    >> what I have read, but where do I look for the cause of the blank CC
    >> display?

    >
    >
    > The Climate Control display has come back to life. I'm going to check the
    > transmission fluid level with the fluid warm. Cold and engine off it's fine.
    >
    > Perce


    Trans fluid level is not monitored by the trans computer and will not set a
    code.
     
    Mike, May 26, 2008
    #4
  5. On 05/26/08 05:13 pm Mike wrote:

    >>> 1. Check Engine light on again. At first I assumed it was P0441
    >>> again, but I checked and found it was P0700, which I understand is a
    >>> somewhat general "Automatic Transmission Fault" message. Pulled the
    >>> fuses for the computer and left them out for a while, and the vehicle
    >>> ran for a couple of miles before the CEL came on again and the
    >>> transmission shifted down. "Argh! Limp mode!" I thought, but I found
    >>> that it *will* shift up from 2nd but only at a higher-than-normal speed.
    >>>
    >>> 2. The Climate Control display is blank. The fuses all seem to be OK.
    >>> All the CC controls seem to work OK, but there is no display.
    >>>
    >>> Is there any one fault that could account for *both* these problems?
    >>>
    >>> The transmission problem seems most likely to be a sensor failure,
    >>> from what I have read, but where do I look for the cause of the blank
    >>> CC display?


    >> The Climate Control display has come back to life. I'm going to check
    >> the transmission fluid level with the fluid warm. Cold and engine off
    >> it's fine.


    The CC display is blank again.

    > Trans fluid level is not monitored by the trans computer and will not
    > set a code.


    I was thinking that low fluid level might cause give rise to a shift
    problem that might in turn generate the P0700 code. But the level is
    fine hot and with the engine running.

    Perce
     
    Percival P. Cassidy, May 26, 2008
    #5
  6. On 05/26/08 05:12 pm Mike wrote:

    >> 1. Check Engine light on again. At first I assumed it was P0441 again,
    >> but I checked and found it was P0700, which I understand is a somewhat
    >> general "Automatic Transmission Fault" message. Pulled the fuses for
    >> the computer and left them out for a while, and the vehicle ran for a
    >> couple of miles before the CEL came on again and the transmission
    >> shifted down. "Argh! Limp mode!" I thought, but I found that it *will*
    >> shift up from 2nd but only at a higher-than-normal speed.


    <snip>

    >> The transmission problem seems most likely to be a sensor failure,
    >> from what I have read, but where do I look for the cause of the blank
    >> CC display?


    > The P0700 code indicates a problem with the trans. You will need a scan
    > tool capable of communicating with the trans computer to determine what
    > the exact trans failure code is. A common failure seems to be the input
    > and/or output speed sensor failure. Don't just throw parts at it, have
    > it scanned so you can find out exactly what the problem is.



    Further Googling suggested a faulty input sensor (in stock at all the
    local Advance Auto stores for $16.xx), but with car on ramps I can't
    reach the sensor anyway -- somewhat limited wrist mobility. On a hoist
    no problem, I'm sure.

    I assume there's no reason to go to Chrysler dealer rather than to
    friendly neighborhood NAPA-affiliated repair guy? Or would only Chrysler
    dealer have the *right* scan tool?

    Perce
     
    Percival P. Cassidy, May 26, 2008
    #6
  7. Mike

    Mike Guest

    "Percival P. Cassidy" <> wrote in message
    news:YMG_j.42$...
    > On 05/26/08 05:12 pm Mike wrote:
    >
    >>> 1. Check Engine light on again. At first I assumed it was P0441 again, but
    >>> I checked and found it was P0700, which I understand is a somewhat general
    >>> "Automatic Transmission Fault" message. Pulled the fuses for the computer
    >>> and left them out for a while, and the vehicle ran for a couple of miles
    >>> before the CEL came on again and the transmission shifted down. "Argh!
    >>> Limp mode!" I thought, but I found that it *will* shift up from 2nd but
    >>> only at a higher-than-normal speed.

    >
    > <snip>
    >
    >>> The transmission problem seems most likely to be a sensor failure, from
    >>> what I have read, but where do I look for the cause of the blank CC
    >>> display?

    >
    >> The P0700 code indicates a problem with the trans. You will need a scan
    >> tool capable of communicating with the trans computer to determine what the
    >> exact trans failure code is. A common failure seems to be the input and/or
    >> output speed sensor failure. Don't just throw parts at it, have it scanned
    >> so you can find out exactly what the problem is.

    >
    >
    > Further Googling suggested a faulty input sensor (in stock at all the local
    > Advance Auto stores for $16.xx), but with car on ramps I can't reach the
    > sensor anyway -- somewhat limited wrist mobility. On a hoist no problem, I'm
    > sure.



    You may be able to reach it from the top.

    >
    > I assume there's no reason to go to Chrysler dealer rather than to friendly
    > neighborhood NAPA-affiliated repair guy? Or would only Chrysler dealer have
    > the *right* scan tool?
    >
    > Perce


    You would have to ask the shop if the have a capable scan tool. The
    Chrysler dealership would definately have the proper scan tool.
     
    Mike, May 27, 2008
    #7
  8. On 05/26/08 08:16 pm Mike wrote:

    >>> The P0700 code indicates a problem with the trans. You will need a
    >>> scan tool capable of communicating with the trans computer to
    >>> determine what the exact trans failure code is. A common failure
    >>> seems to be the input and/or output speed sensor failure. Don't just
    >>> throw parts at it, have it scanned so you can find out exactly what
    >>> the problem is.


    >> I assume there's no reason to go to Chrysler dealer rather than to
    >> friendly neighborhood NAPA-affiliated repair guy? Or would only
    >> Chrysler dealer have the *right* scan tool?


    > You would have to ask the shop if the have a capable scan tool. The
    > Chrysler dealership would definately have the proper scan tool.


    Friendly neighborhood NAPA-affiliated repair guy recommended taking it
    to the Chrysler dealer or to a transmission specialist, so I took it to
    the dealer that's been servicing it for the last 4+ years. Took a while,
    but they eventually got additional codes (I didn't write them down) that
    corresponded to those in a TSB concerning some valve(s) or other. They
    have to order in parts (due tomorrow morning) and replace the valve body
    and other parts. The extended warranty (which I thought had expired
    already) will cover it for the standard $100 deductible vs. $600+ for
    parts and $200+ for labor.

    Perce
     
    Percival P. Cassidy, May 28, 2008
    #8
  9. Mike

    Mike Guest

    "Percival P. Cassidy" <> wrote in message
    news:%5l%j.2309$...
    > On 05/26/08 08:16 pm Mike wrote:
    >
    >>>> The P0700 code indicates a problem with the trans. You will need a scan
    >>>> tool capable of communicating with the trans computer to determine what
    >>>> the exact trans failure code is. A common failure seems to be the input
    >>>> and/or output speed sensor failure. Don't just throw parts at it, have it
    >>>> scanned so you can find out exactly what the problem is.

    >
    >>> I assume there's no reason to go to Chrysler dealer rather than to
    >>> friendly neighborhood NAPA-affiliated repair guy? Or would only Chrysler
    >>> dealer have the *right* scan tool?

    >
    >> You would have to ask the shop if the have a capable scan tool. The
    >> Chrysler dealership would definately have the proper scan tool.

    >
    > Friendly neighborhood NAPA-affiliated repair guy recommended taking it to
    > the Chrysler dealer or to a transmission specialist, so I took it to the
    > dealer that's been servicing it for the last 4+ years. Took a while, but
    > they eventually got additional codes (I didn't write them down) that
    > corresponded to those in a TSB concerning some valve(s) or other. They have
    > to order in parts (due tomorrow morning) and replace the valve body and
    > other parts. The extended warranty (which I thought had expired already)
    > will cover it for the standard $100 deductible vs. $600+ for parts and $200+
    > for labor.
    >
    > Perce


    Glad to hear you got it fixed so quickly. Nice to have it covered under the
    extended warraty!
     
    Mike, May 29, 2008
    #9
  10. On 05/28/08 07:50 pm Mike wrote:

    >> Friendly neighborhood NAPA-affiliated repair guy recommended taking it
    >> to the Chrysler dealer or to a transmission specialist, so I took it
    >> to the dealer that's been servicing it for the last 4+ years. Took a
    >> while, but they eventually got additional codes (I didn't write them
    >> down) that corresponded to those in a TSB concerning some valve(s) or
    >> other. They have to order in parts (due tomorrow morning) and replace
    >> the valve body and other parts. The extended warranty (which I thought
    >> had expired already) will cover it for the standard $100 deductible
    >> vs. $600+ for parts and $200+ for labor.


    > Glad to hear you got it fixed so quickly. Nice to have it covered under
    > the extended warranty!


    I am even more glad today that it's being covered under the extended
    warranty, because now they have discovered that yet other parts need to
    be replaced -- something about contamination of some seals.

    Perce
     
    Percival P. Cassidy, May 30, 2008
    #10
  11. Bill Putney

    Bill Putney Guest

    Percival P. Cassidy wrote:
    > On 05/28/08 07:50 pm Mike wrote:
    >
    >>> Friendly neighborhood NAPA-affiliated repair guy recommended taking
    >>> it to the Chrysler dealer or to a transmission specialist, so I took
    >>> it to the dealer that's been servicing it for the last 4+ years. Took
    >>> a while, but they eventually got additional codes (I didn't write
    >>> them down) that corresponded to those in a TSB concerning some
    >>> valve(s) or other. They have to order in parts (due tomorrow morning)
    >>> and replace the valve body and other parts. The extended warranty
    >>> (which I thought had expired already) will cover it for the standard
    >>> $100 deductible vs. $600+ for parts and $200+ for labor.

    >
    >> Glad to hear you got it fixed so quickly. Nice to have it covered
    >> under the extended warranty!

    >
    > I am even more glad today that it's being covered under the extended
    > warranty, because now they have discovered that yet other parts need to
    > be replaced -- something about contamination of some seals.
    >
    > Perce


    The ATC display intermittently going blank is a very common problem on
    the LH cars. I would think that woujld be covered under the extended
    warrranty too - hopefully it will decide to act up when they're looking
    at it - perhaps a gentle banging with the fist (on the ATC head unit)
    will cause it to act up. Or perhaps pushing on the display with your
    thumb will turn the problem on and off - often it will.

    If you want to take care of it yourself:
    Solder cracks on surface mount parts on the p.c. board are the problem.
    Some (myself included) have been successful at resoldering the loose
    parts, but you can buy the entire ATC head unit all day long for under
    $50 including shipping from junk yards. Plus, if you don't have the
    tools or skills to do very delicate soldering, you'll ruin it anyway.

    To find for under $50 including shipping, drill down at www.car-part.com
    - narrow the geographical area as much or as little as you want.

    Don't let the price on the first page scare you - they're listed in
    order of descending price. Go to the page with the asterisk by the page
    number at the bottom of the first page once you've done the drill down.
    That will take you to the dividing line between the lowest price and
    the "call for price" pages. Then work your way up the list for a low
    price. When you put the vehicle description in, any that come up (of
    other years and badging) will be interchangeable with yours - generally,
    the newer the better.

    Then pick a salvage yard in your region and call the 800 number - they
    will ship to you for a nominal shipping fee.

    Bill Putney
    (To reply by e-mail, replace the last letter of the alphabet in my
    address with the letter 'x')
     
    Bill Putney, May 31, 2008
    #11
  12. LH series ATC display. Was: '02 300M: Code P0700 and...

    On 05/31/08 10:56 am Bill Putney wrote:

    > The ATC display intermittently going blank is a very common problem on
    > the LH cars. I would think that woujld be covered under the extended
    > warrranty too - hopefully it will decide to act up when they're looking
    > at it - perhaps a gentle banging with the fist (on the ATC head unit)
    > will cause it to act up. Or perhaps pushing on the display with your
    > thumb will turn the problem on and off - often it will.
    >
    > If you want to take care of it yourself:
    > Solder cracks on surface mount parts on the p.c. board are the problem.
    > Some (myself included) have been successful at resoldering the loose
    > parts, but you can buy the entire ATC head unit all day long for under
    > $50 including shipping from junk yards. Plus, if you don't have the
    > tools or skills to do very delicate soldering, you'll ruin it anyway.


    <snip>

    I am not averse to soldering, but how do I remove the display unit to
    work on it?

    Perce
     
    Percival P. Cassidy, Jun 13, 2008
    #12
  13. Bill Putney

    Bill Putney Guest

    Re: LH series ATC display. Was: '02 300M: Code P0700 and...

    Percival P. Cassidy wrote:
    > On 05/31/08 10:56 am Bill Putney wrote:
    >
    >> The ATC display intermittently going blank is a very common problem on
    >> the LH cars. I would think that woujld be covered under the extended
    >> warrranty too - hopefully it will decide to act up when they're
    >> looking at it - perhaps a gentle banging with the fist (on the ATC
    >> head unit) will cause it to act up. Or perhaps pushing on the display
    >> with your thumb will turn the problem on and off - often it will.
    >>
    >> If you want to take care of it yourself:
    >> Solder cracks on surface mount parts on the p.c. board are the
    >> problem. Some (myself included) have been successful at resoldering
    >> the loose parts, but you can buy the entire ATC head unit all day long
    >> for under $50 including shipping from junk yards. Plus, if you don't
    >> have the tools or skills to do very delicate soldering, you'll ruin it
    >> anyway.

    >
    > <snip>
    >
    > I am not averse to soldering, but how do I remove the display unit to
    > work on it?
    >
    > Perce



    You pull the woodgrained radio bezel rearward from the dash. Start out
    by removing the ashtray (press down on the tab inside the ashtray) and
    de-mating the cigarette lighter socket and traction control (if it has
    it) switch connectors. Then pull the bezel away from the dash at the
    bottom and work your way up to the top. The ATC control unit is
    attached to the bezel from the front (non-visible) side with screws.
    The connector has a tab on one side that you push in to release and
    de-mate the connector from the control unit. There are some screws to
    disassemble it - you will see a small fan built into the unit too.

    I will warn you that the metal ends of the surface mount components, as
    well as the p.c. board traces they attach to are fragile - they don't
    stand up well to excess heat or mechanical stress.

    On mine, the bad joints were on those blue resistors in this photo:
    http://images14.fotki.com/v336/photos/4/42816/3749556/IMG_0834b-vi.jpg

    Also - you may not even be able to see the cracks in the solder. The
    only way I knew where they were was connecting the p.c. board back up to
    the car out of the case and pressing different places until I found the
    place that I could press on to turn the problem (the display lighting)
    on and off.

    Bill Putney
    (To reply by e-mail, replace the last letter of the alphabet in my
    address with the letter 'x')
     
    Bill Putney, Jun 13, 2008
    #13
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