Hi everyone,

Whie driving my 03 Dodge Caravan home from work, the check engine light came on and the Van went into Limp-in mode. The Van runs and starts fine, it is just stuck in limp-in mode. I stopped and got the codes read on the way home. P0700 and P0725. I have been searching around for a while and understand that P0700 just lets you know there is an error in the transmission module.

P0725- Engine Speed input Circuit Malfunction...

Looking through other posts and different sites I have seen a few different takes on this. There are two things that I am thinking are causing the problem.

1. Crank Position Sensor
2. Transmission Input Sensor

I am not sure what sensor I should replace and if this is even the solution to the problem. Any help would be greatly appreciated!

Thanks

 

Replace the input and output speed sensors on the transmission

 

I also have this problem and replaced both sensors, Yet I still have the same problem, What else can it be that wil give a P0700 and P0725 code.

 

Ck the crank sensor wires, if they look okay(not melted together) replace the crank sensor.

 

if all fails, pull the little mini fuse at the top of fuse box, disconnect the battery for 30 secs and then reconnect the battery and put fuse back in. Crank van and see if that works.

 

i'm getting the same problem on my '06, but only when it rains. the dealer replaced the output sensor, but still getting the same problem. are there any tricks for keeping the moisture from causing issues?

 

The sensors should have a seal on the connector to keep the moisture out. You can add some dielectric grease to the sensors.

 

i had the same probleme with my caravan 2002, i already replaced both sensors ,output and input speed sensor but the probleme s'till there and the codes p0700 and p0725 re-appering in ob2 scaners, please i need input from you gays

 

Just curious. The crankshaft position sensor supplies the input the tachometer uses to display rpms. Is the tach display irratic or dead? It would be another reason to change then crank sensor. Another would be if the van stalled now and then. Also you might try inspecting the contacts on the TCM connections for corrosion or damage.

EDIT *** Just found this: http://www.trnw.net/fixdata-display....=ottowerx:5830 Not implying this is what will fix your van just saying here's one possiblility.

 

rollito
Welcome to DF
Here is part of a PDF file for code P0725. This is what the dealer use's. Just don't forget about a flex plate too.
TEST ACTION APPLICABILITY
3 NOTE: This code is not a Transmission Input Speed Sensor DTC
With the DRBIIIt, Check the STARTS SINCE SET counter for P0725.
NOTE: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter set at 0?
All
Yes ! Go To 4
No ! Go To 7
4 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Crank Position Sensor harness connector.
Measure the resistance of the Crank Position Sensor Ground circuit between the
TCM harness connector and the CKP harness connector.
Is the resistance above 5.0 ohms?
All
Yes ! Repair the Crank Position Sensor Ground circuit for an open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No ! Go To 5
5 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Crank Position Sensor harness connector.
Measure the resistance of the Crank Position Sensor Signal circuit between the TCM
harness connector and the CKP harness connector.
Is the resistance above 5.0 ohms?
All
Yes ! Repair the Crank Position Sensor Signal circuit for an open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No ! Go To 6
6 If there are no possible causes remaining, view repair. All
Repair
Replace the Transmission Control Module. WITH THE DRBIIIt
PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
7 The conditions necessary to set the DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Check the power and ground circuits of the Transmission Control Module.
Start the engine.
With the DRBIIIt, monitor the Engine RPM.
Wiggle the wire harness between the TCM and CKP.
Were any problems found and/or did the Engine RPM change while wiggling the
harness?
All
Yes ! Repair wiring and/or connectors as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No ! Test Complete.