Question about 1992 Plymouth Voyager

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Code 15 eatx relay output always off...transaxe don't shift...A technician find the error code 15.

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  • jimmon888 Jan 24, 2009

    Sounds good, whats limp in mode? Also the reverse is out. Reboot makes the trans achiev 1st gear only, Sometimes locks up ok, other times slips out of gear at 1100 rpm or 12 mph, other times it will go to 20 mph. Also infrequent speedo needle failure to operate. Will try those 2 sensors and get back to you. BTW are there more sensors>?,,, To add, ths all happened immediately after running over a chunk of ice off a wheel well (wisconsin) in the area of the lower sensor, but shows no obvious damage.

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Replace your input and output speed sensors on the trans. The reason why it won't shift is because the trans. is in "limp in" mode. The trans. computer is detecting a problem.

Posted on Nov 29, 2008

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I have a 1999 Jeep grand Cherokee that when it shifts out of overdrive the transmission bangs is that the TCM or I don't think it's a speed sensor or I don't think it is a solenoid can you help me. It...


In a Jeep, OBDII code P0700 indicates that the EATX (Transmission controller) has an active fault and has illuminated the MIL (Malfunction Indicator Lamp aka Check Engine light) via a BUS message. The specific fault must be acquired from the EATX via a DRBIII tool. So until you hook it up to a DRBIII scan tool, you really know what is wrong with your transmission. Input or Output Speed Sensor failures often cause this P0700 code and are a common failure part on Jeep Grand Cherokees. So take it to a dealer you trust or ask around for a transmission shop you could trust - they will have the DRBIII scan tool and you will pay them (in most cases) an hour's labor costs ($60-$100) to tell you what the internal codes are and what it MIGHT take to fix it. Or (this is what I would do), you can try replacing both Input and Output speed sensors yourself and see if that cures it. You will likely spend about $80-$100 on those 2 parts. The dealership will charge you about $180-$250 for those 2 parts plus another hour of labor to put them in. Good luck.

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Coud p0753 durango 1998


DTC P0753 is for the 3-4 shift solenoid in the trans.
This is an electrical code, it will set when the voltage seen by the engine controller on the solenoid's control circuit is incorrect. The solenoid pack gets a constant 12v from the trans relay and is controlled by the engine controller by switching ground.

Since you don't have a code for the TCC solenoid that shares the same relay feed and you don't have a trans relay code set we know the problem is isolated to the solenoid or it's control wire. It could be a short, broken wire, or corrosion in the control wire between the trans and engine controller, but this is almost always the solenoid itself.

This code is not not saying replace parts. They say check it out on yours a code 753 points to a 3-4 shift solenoid relay problem or wiring problem. Other thing to check could be the speed sensor module that screws into the side of the transfer case. back feeding bad info to ECM.

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Hope helps.

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replace the output speed sensor on you 4 speed trans, 3.3 engines only have 4 speed transmissions. The output sensor is located next to the transfer gear. Or if you are looking the two sensors, it would be the one on the right.

P700 = PCM has a transmission code in the EATX controller, and P0731= Gear ratio error in 1st. Replace the output speed sensor and clear the codes.

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P0700 (M)
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P0750
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I have a 98 plymouth grand voyager with a 3.3l 4 speed transmission. My van goes into limp mode after a couple minutes of driving. My question is how do I determine if my shift solenoid or my tcm is the...


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