P1744Manufacturer-specific code

P1744 Code: Torque Converter Clutch System Performance (Ford)

On Ford, Lincoln and Mercury vehicles, the P1744 code means the torque converter clutch system is not performing as it should. You may notice a high transmission temperature. Other brands may define this number differently.

Severity
High
Can I keep driving?
Yes, but with caution
Estimated cost
$100 to $2,000
Difficulty
Hard
System
Transmission
Applies to
Depends on the manufacturer

Common in: Ford

Updated Reviewed by Renzo Chacca

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What the P1744 code means

P1744 is a manufacturer-specific code: the 1 in the second position means each automaker defines what it means, not the generic SAE standard. The most widespread definition is the one used by Ford, Lincoln and Mercury. If your vehicle is another brand, confirm the code text with a scan tool that supports that manufacturer.

ManufacturerMeaning of P1744
Ford, Lincoln and MercuryTorque converter clutch system performance

In Ford automatic transmissions the computer controls shifts and torque converter lockup, and it watches the fluid temperature with the TFT sensor.

The computer sets the P1744 code when it commands the converter to lock up and slip stays high: the clutch slips or does not apply.

Before you start repairs, confirm the make, model, year and engine. With manufacturer codes, the same number can change even between engines from the same brand.

P1744 code symptoms

  • Shudder at a steady speed.
  • High transmission temperature.
  • Higher fuel use on the highway.

Likely causes of the P1744 code

  1. Old or low transmission fluid. Check the level, condition and viscosity.
  2. Converter solenoid. Confirm it with the tests in the diagnosis section.
  3. Worn valve body. Check it by commanding it with the scan tool.
  4. Worn converter clutch. Confirm it with the tests in the diagnosis section.

How to diagnose the P1744 code step by step

  1. Check the fluid level and condition.
  2. Watch the slip on the scan tool.
  3. Test the solenoid.

How to fix the P1744 code

  • Change the fluid with the correct specification.
  • Replace the solenoid or repair the valve body.
  • Replace the converter if it is worn.

Technical reference data

  • Slip of a locked converter: close to 0 rpm.
  • P1xxx codes are manufacturer-specific: confirm the definition with a scan tool that supports your brand.
  • Reference values: check the manufacturer data for your vehicle.

Brand-specific notes

Start with the fluid. A fluid change is cheap, and a converter replacement is not, so rule out the easy things first.

P1744 on Ford

Common on the Focus, Fiesta, Escape, Explorer, Ranger, F-150 and Mustang.

If your vehicle is another brand, check the table above for the meaning its manufacturer gives this code and confirm it with a compatible scan tool.

Frequently asked questions about P1744

What does the P1744 code mean on a Ford?
It means the torque converter clutch system is not performing as it should. You may notice a high transmission temperature.
Does P1744 mean the same thing on every brand?
No. It is a manufacturer-specific code, so on other brands it may not exist or may mean something different. Confirm it with a scan tool that supports your make.
Can I drive with a P1744 code?
With caution. Severity is high with a P1744 code, so avoid heavy loads and towing until the transmission has been checked.
How much does it cost to fix P1744?
Roughly $100 to $2,000 on a Ford. A fluid change is at the low end, while a new converter or valve body repair costs the most.
Will a P1744 code clear itself?
Not while the converter clutch keeps slipping. A fluid change may help in mild cases, but a worn clutch or solenoid brings the code back.
What is the most common cause of P1744?
Old or low transmission fluid is the first thing to check. The converter solenoid, a worn valve body and a worn converter clutch come next.

Related codes

Questions about the P1744 code

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