QuestionQUESTION: I Roland I am hoping for some help. I changed my thermostat in the car last week and went to leave and my car wouldn't come out of 1st gear. We had the codes read and they told us it was the Solenoid Pack. we replaced that and it's still stuck in 1st gear and now with a code of 1739 and stuck in low & reverse. Can you help me. Someone told me to trace the wire diagram for code 1739, but I cant find anything about this code. I looked at all your prior questions and answers and there was only one about this code. Anything you could say or tell me to do would be greatly appreciated> :) Just so you no, I had not had any problems with the car prior to this happening.
ANSWER: Hi Tonia,
The trans is actually stuck in second gear, which is a 'fail-safe' strategy to protect against further damage. It is called limp-in mode. It is accomplished by the transmission control relay being turned off. It can also do that if the current that normally goes through the relay is disconnected.
Can you tell me in more detail about the history:
Where was the thermostat changed, at home or a shop?
When the thermostat was changed, did coolant get on the transmission control module or the power distribution box (fuse/relay box) in the engine compartment?
What was the fault code specifically that let to the replacement of the solenoid pack?
Who replaced the solenoid pack, a dealer, an independent shop, a family member?
After the replacement did the vehicle run properly ever and if not, what did the shop say at that time about the ineffectuality of that repair?
The code is about the 12V power to the transcontrol module being lost while you were in a drive gear and then was restored. It suggests a problem with either the supply wire direct from the battery to the TCM, or from the ignition switch to the TCM.
What is the year model and body style of the Sebring?
Roland
---------- FOLLOW-UP ----------
QUESTION: My car is a 1998 Chrysler Sebring ConvertibleJX. The thermostat wa changed at home by a family member. I don't believe any fluid got anywhere from what I was told. The Solenoid Pack was replaced by the same family member that is a at home mechanic. After we replaced the solenoid pack and cleared the codes the car ran fine on the very next start up. Then it sit overnight and the next am it wouldn't come out of 1st gear immediately. Right now the codes say P1739 Power up at speed and P0750 LR Solenoid Circuit error. . Hope this additional info helps. :)
AnswerHi Tonia,
The 0750 may be caused by a defective solenoid pack, so that is a possibility to consider. Also the wire connecting the TCM to the LR solenoid is a possibility for being open or short-circuited to ground. The tcm itself might have a loose ground connection, and finally the TCM could be defective.
The home mechanic can check the solenoid wire: the wire is light blue/white and is connected between pin 7 of the solenoid pack and pin 20 of the TCM. Check it for continuity (after disconnecting both plugs) and also check that it is not shorted to ground when plug is disconnected at the TCM. The TCM grounds the wire to activate the solenoid in normal trans operation when required.
The TCM ground wires are on pins 53 and 57 of the TCM plug, so those could be verified as well.
If the 1750 code first appeared after replacing the solenoid pack, and the wiring is verified as described, then you may well have a defective replacement solenoid pack.
Again, was there a code that prompted the pack to be replaced?
Roland
PS Thanks for the rating and nomination.
