Limp mode?

Tiny
ANONYMOUS
  • MEMBER
  • 2006 DODGE CARAVAN
  • 88,203 MILES
2006 Dodge Caravan transmission in limp mode with no reverse. I can drive it but it doesn't shift past 30mph. OBDII codes are P0700 and P0882. I'm having trouble locating TCM relay and I was wondering if there is a relay because TCM is integrated with PCM. Mechanic said to replace entire PCM but nothing else is wrong as far electrical is concerned. Thanks.
Saturday, February 23rd, 2013 AT 6:56 PM

37 Replies

Tiny
ASEMASTER6371
  • EXPERT
Do not do what the guy said till it is checked out first. That was an expensive guess that I bet will not work.

The no reverse is what concerns me. Go to a trans shop and have them check it. It sounds like you have an internal failure in the trans.

Roy
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Saturday, February 23rd, 2013 AT 7:01 PM
Tiny
A_LOPEZ
  • MEMBER
Internal failure! Hearing that concerns me even more. I changed the trans fluid and found no metal attached to the magnet inside the pan. I just have a gut feeling that it's an electrical issue because there were absolutely no signs at all that would lead me believe that it is a mechanical failure. It just happened overnight. P0882 code says low voltage to TCM. Why is it saying this when the TCM is integrated into the PCM?
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Saturday, February 23rd, 2013 AT 8:58 PM
Tiny
ASEMASTER6371
  • EXPERT
Yes, but no reverse is a hyraulic issue not electrical. Thats why I suggested internal failure.

The limp mode may be electrical but will not solve the no reverse issue

Roy
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Saturday, February 23rd, 2013 AT 9:17 PM
Tiny
SG4954
  • MEMBER
  • 2003 DODGE CARAVAN
Transmission problem
2003 Dodge Caravan 6 cyl Front Wheel Drive Automatic 165k miles

Hi. I have replaced the input and output sensors on my transmission. I have also changed the the transmission computer with a used one. I have checked connections for bad wires, all looks good. When I removed the battery cables overnight the transmission shifted fine for a half mile then back to it's limp mode. I'm wondering if you think it could be the pcm? I'm also wondering how do I test if is the pcm before I buy one. I have found a used one and I'm wondering if it has to be programed before I install it. I guess I'm wondering what will happen if I just plug the new pcm into the van? I have also read about a solenoid pack? I'm not convinced it's the solenoid pack since van shifted fine for a half mile. Any help would be great.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
CH112063
  • MEMBER
The only way to be sure about what is causing this is by using a good generic scan tool, and read the TCM codes from the manufacturers connector. It is seperate from the OBD connector. You will be able to read and check the inputs. Ok?
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
SANDMAN31
  • MEMBER
  • 2003 DODGE CARAVAN
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
I have a 2003 caravan with 125000 kms on it drove the van one day ran fine not a problem next morning started it got 10 feet out of driveway and engind light came on as I drove further sounded like it was revving high found out later it is in limp mode tranny only shifts into second code comes up Engine Speed Input Circuit dealer told me it was either input or output sensor on tranny changed both no difference I still have my speedometer do you know what might be causing this problem
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
ZACKMAN
  • MEMBER
Usually, with A604 transmission, changing both input and output sensor solves the problem. If it doesn't, then you need to check the transmission control module, before you replace it.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
SANDMAN31
  • MEMBER
Already changed both speed sensors as well as crank position sensor does the computer reset it self or does that still have to be done by dealer the code coming up is p0700 and p0725
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
ZACKMAN
  • MEMBER
P0700 Transmission Control System Malfunction
P0725 Engine Speed input Circuit Malfunction

You don't have to go back to the dealer. Autozone and CSK/O'Reilly can reset the computer for you. You can also unplug the negative battery terminal for more than 30 minutes to reset it yourself, but then you have to reset your clock and radio stations, and stuff, and the computer has to re-learn everything else. Based on the codes (P0700), I believe you have to replace your transmission control module. That was what I had to do with mine several years back.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
SG4954
  • MEMBER
  • 2003 DODGE CARAVAN
Transmission problem
2003 Dodge Caravan 6 cyl Front Wheel Drive Automatic 165k miles

Ok I still have not gotten anywhere on this van. I have received these codes p01684 p0700 from turning my key on off on. I have also received p0755 from a scanner. I have replaced the input and output sensors I have also had the tcm reprogrammed and the pcm repaired and reprogrammed. My transmission is still stuck in limp mode. Pcm and Tcm were rebuilt from auto computer exchange. Com. Does anyone have any idea/suggestions. The transmission fluid is clean and does not smell burnt or have metal filings. I wanted to know if there is a way to test the solenoid pack before I bought a new one.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
The P1684 just simply means that the battery was disconnected within the last 50 starts. That will go away on its own and is nothing to worry about if you did indeed disconnect the battery.

Have you done so? And why? Problems occur before doing that?

P0755 is solenoid b pack issue. First I would make sure the solenoid pack is clean and the connectors going into it are tight and secure. Also clean up the inside terminals of the pack. Make sure they are not moving around to do this poke them with a small screwdriver it should move very little.

P0700 is a tcm issue but seems like you already replaced that and that code can be thrown by the p0755 so well concentrate on that one for now.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
SG4954
  • MEMBER
I have replaced the battery. I was told to by the tcm/ pcm rebuilder to do so when I reinstalled the parts. Today I read a article about making new ground paths. I ran a 10 gauge wire from the negative to the alternator bracket. I also ran one from the negative to the tcm. I still have the same results ( limp mode). I did notice the conncection to the shift solenoid was a little dirty / oily. My money is limited so I was wondering if their isn't any loose wires going to the solenoid pack would you think it's the solenoid pack, also would you buy after market or from dealer?
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
Id be cheap and get one from a junk yard and see how that went. If that fixed it then get a new one. If not tehn it may not be the solenoid

they bout 200 bucks for the part. And they can really mess up your transmission if left bad. Resulting in total rebuild
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
CCAN33
  • MEMBER
  • 2003 DODGE CARAVAN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
My caravan developed the following problem this past weekend, transmission would shift to 2nd and would not shift any further. I took vehicle to repair shop and they found the following error codes, 0700, 0733, 0734 and 1790. The repair shop recomended that I replace transmission to the tune of about $3,000 at the moment with times as hard as they are, I cannot afford it. I have been on you site and have noticed various posts on dodge transmissions and one recurrent solution is to replace the solenoid pack. Is this a job that I can do, I have worked on my own cars before, changing water pumps and other various items. Where is this solenoid pack located and is it an easy replacement? Thanks!
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
OBXAUTOMEDIC
  • EXPERT
Hello,

Yes you should be able to handle replacing the solenoid pack, the pic below is of a 97 but should be in same place. Also there are other possibilities...

The P0700 - is indicationing the TCM (Transmission Control Module) which is the Computer for the tranny.

The other 2 codes indicate the 3rd and 4th shift solenoids which could be the solenoid pack.

And the last code could be do to the TCM.

However, trying to diagnose the exact cause is a pain and to just start replacing electrical parts can cost you plus you cannot return them.

I would recommend taking it to a Transmission Shop for proper diagnosis.


https://www.2carpros.com/forum/automotive_pictures/188069_97caravanselenoidpac_1.jpg



.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
CCI
  • MEMBER
  • 2003 DODGE CARAVAN
  • 3.8L
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 130,000 MILES
I am following up about a transmission issue that I had posted earlier. My grand caravan slips into limp mode periodically. So far I have had the ecm and the tcm flashed and reprogrammed. The solenoid was replace 11 months ago. I have replaced the relay for the eatx. I have checked and verified the grounds for the transmission. The codes I pulled when this all started were p0700 p1776. I also need to replace the sensor for the ABS. The can will go from 1 day to 4 days will out dropping into limp mode. It does seen to happen at the same point of a commute, when the van needs to down shift a lot going up a hill. I am just looking to see if you may have some insight/familiarity with this.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
HMAC300
  • EXPERT
It sounds like an intermittent problem so check your connections at trans and try putting some dielectric compound on connectors on trans especially if you see corrosion. Try to clean off corrosion as well. Carefully inspect harness to see if there are any bare spots on wires that may touch the body/engine/trans. Check connections at tcm as well.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
JAYMANN1992
  • MEMBER
  • 2003 DODGE CARAVAN
  • 3.3L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 115,000 MILES
I have a 2003 dodge grand caravan with a 3.3, I am stuck in limp mode, only codes I get are p0700 and p1684, I have replaced both output and input speed sensors, I have tested wires I am weighing on it being either a bad TCM or the solenoid pack, I however believe that I am of fault as to why it went into limp mode, I was at a red light, I needed to get over a lane, so me being an complete **** I applied the break and gas pedal to anticipate the change in the light switching to green, when I let go of the brake, I noticed the limp mode, any aspect as to what I may or may not have done to cause this will be greatly appreciated
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
HMAC300
  • EXPERT
The 0700 is the etax controller which could have been set by the p1684 see pics for diagnosis on thing s to check otherwise let a pro handle it.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)
Tiny
JAYMANN1992
  • MEMBER
I've checked the pins 56 and 57, I have positive connection at 56, and grounded connection at 57, when the car is running, it seems as though I have a ground connection at 15, I've read that that was suppose 12v positive don't know if that's an issue or normal.
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Saturday, June 20th, 2020 AT 12:34 PM (Merged)

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