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TCM ? transmission control module ? Did you have it programmed ?
Reprogram the TCM. Refer to Control Module References for programming and setup information.
Transmission Control Module Programming and Setup
The transmission control module (TCM) must be programmed with the proper software/calibrations. Ensure that the following conditions exist in order to prepare for TCM programming:
• The battery is fully charged.
• The ignition switch is in the RUN position.
• The Techline equipment cable connection at the data link connector (DLC) is secure.
Program the TCM using the latest software matching the vehicle. Refer to up-to-date Techline equipment user instructions.
If the TCM fails to program, proceed as follows:
3.1. Ensure that the TCM connection is OK.
3.2. Inspect the Techline equipment for the latest software version.
3.3. Attempt to program the TCM. If the TCM still cannot be programmed properly, replace the TCM.
code p0740 refers to torque converter clutch (TCC) solenoid --circuit malfunction Causes---Wiring---TCC solenoid--- ECM/TCM Code p2716 refers to transmission fluid pressure(TFP) solenoid D-electrical Causes---Wiring---TFP solenoid. Code p0785 refers to shift/ timing solenoid circuit malfunction Causes---Wiring---shift/timing solenoid---ECM?TCM The common fault here appears to be the TCM ( transmission control module) have it check out..
Few things can cause this, it's either a faulty transmission solenoid or a faulty TCM (transmission control module). Try to consult a reputable mechanic for this will require an on hand trouble shooting.
Hope this helps and thank you for using FixYa! Have a good one!
Trouble code identification:
VAG type 5-digit fault code 18034 = EOBD type P1626 fault code:
Fault location = CAN data bus, TCM - no signal
Probable cause = TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM.