The dreaded P1740 Code
#1
The dreaded P1740 Code
Since first receiving the code i have replaced the TCC soleniod, TPS, changed fluid and filter, and adjusted the shifter linkege. Nothing has helped. When i first replaced the TCC soleniod it helped for a while but soon went back to the rpms jumping 200-300 at 50-60 mphs. While replacing the TCC soleniod i changed the fluid and filter. Then about 2 weeks later i replaced the TPS. Currently when i reset the check engine light the truck will run and shift fine for a while (the other day i went 70miles before i had a problem) then the check engine light will come on while driving and the rpm jumps will soon follow. I then can reset the light and run again a while shifting fine before the light comes on and rpm jump reapper. So heres by questions:
1)Could my new tcc soleniod be bad? If so how would i know? I bought the solniod from NAPA and they will not exhcange it for another one so that i can see if mine is bad.
2) Could by torque conventor be bad even though the trans shifts fine for many miles?
3) Anymore answers to the code? I have read the about a 5 ohm wire grounding out in the trans. but i cant not find any information on how to check or find the wire.
1)Could my new tcc soleniod be bad? If so how would i know? I bought the solniod from NAPA and they will not exhcange it for another one so that i can see if mine is bad.
2) Could by torque conventor be bad even though the trans shifts fine for many miles?
3) Anymore answers to the code? I have read the about a 5 ohm wire grounding out in the trans. but i cant not find any information on how to check or find the wire.
#2
#3
#4
RE: The dreaded P1740 Code
There is a sensor that is attached to the valve body along with the solenoid. It is how the solenoid communicates with the PCM so it knows when to release the converter clutch.
Also, have you checked to see if you maybe have a bad electrical connection to the solenoid.
Also, have you checked to see if you maybe have a bad electrical connection to the solenoid.
#6
RE: The dreaded P1740 Code
i am planning on this weekend dropping the pan once again to check for loose connections and to see if some how oil has seeped into the conections. At that time i will look for the sensor. Does anyone know the cost of the sensor or has a similar problem with the sensor afther changing the soleniod. My TCC soleniod has 3 plugs to go to different places inside the pan.
#7
RE: The dreaded P1740 Code
The sensor may be part of the solenoid, i'm not sure. I was under the impression it was seperate. When mine was acting up, I was told I needed to replace both the solenoid and the matching sensor. It went away on it's own though, so I have never changed anything.