How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask jack duppel Your Own Question
jack duppel
jack duppel, Auto Service Technician
Category: Ford
Satisfied Customers: 393
Experience:  ASE Certified Auto Technician
Type Your Ford Question Here...
jack duppel is online now
A new question is answered every 9 seconds

Trouble code P0743 Torque Converter Clutch System Electrical.

Resolved Question:

Trouble code: P0743 Torque Converter Clutch System Electrical. What is the most common problem and how to solve it.
Submitted: 8 years ago.
Category: Ford
Expert:  jack duppel replied 8 years ago.

Hello Chris and Welcome to JA,

You will most likely end up removing the cover/pan to inspect the harness that goes to all the solonoids and then to inspect the valvebody and the TCC solonoid itself. If you have a multimeter then you could ohm through the harness and even the solonoid. I have found that most of the time this code was produced because of the solonoid itself. But it could be the circuits to it also. There is abig connector an top of the trans that goes into the trans and the internal harness ispect that connector for any corrosion or damaged pins or wires. Good Luck and if you need more just ask please.

P0743 TCCTCC solenoid circuit failure during on-board diagnostic.TCC solenoid circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM drive failure during on-board diagnostic.Failed ON - engine runs rough/vehicle shudder, engine stalls in DRIVE (2nd, 3rd or 4th) at low idle speeds. (Short circuit).
Failed OFF - torque converter clutch never engages (Open circuit) (MIL on).

jack duppel and 2 other Ford Specialists are ready to help you
Customer: replied 8 years ago.
Thank you. The cover has been removed. Steel particles had been found inside. ATF quite black