P0744: Torque Converter Clutch Circuit Intermittent
What Does P0744 Mean?
P0744 is a diagnostic trouble code indicating: Torque Converter Clutch Circuit Intermittent. This code relates to the transmission system. It has been reported in NHTSA complaints across 8 different vehicle models.
The automatic transmission is controlled by the TCM using input from speed sensors, temperature sensors, and pressure sensors. When the TCM detects a fault, it may activate limp mode (2nd or 3rd gear only). Shift solenoids are electromagnetic valves inside the valve body controlling hydraulic fluid flow. Modern transmissions use 4-8 solenoids in combination for each gear. Solenoid failures are often caused by contaminated fluid — worn clutch material and degraded fluid create varnish that sticks solenoids. Always check transmission fluid first: level, color (red/pink good, brown/black bad), and smell (burnt = internal damage). Transmission DTCs escalate fast — a $200 solenoid fix can become a $3000-$5000 rebuild if ignored.
Symptoms of P0744
- ⚠️ Check engine/transmission warning light on
- ⚠️ Harsh, delayed, or erratic shifting
- ⚠️ Transmission stuck in one gear (limp mode)
- ⚠️ No upshift or no downshift
- ⚠️ Transmission slipping
- ⚠️ RPM flares between shifts
Common Causes
- 🔍 Faulty shift solenoid
- 🔍 Contaminated transmission fluid
- 🔍 Wiring issue between TCM and solenoid
- 🔍 Valve body wear
- 🔍 TCM internal failure
P0744 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The Car seems to always have a strange issue with power. I have taken it for all services and recall but nothing has every fixed that issue. From talking to other Ford fusion 2013-2014 owners the transmission is bad on these cars from the start. It would be bad to loose or have the transmission go o"
— Ford Fusion owner, 04/21/2023
"DRIVING APROX. 40 MPH WRENCH LIGHT COMES ON, CALL DEALERSHIP TO SEE WHAT WOULD CAUSE IT. THEY SAY TO KEEP DRIVING UNTIL THE CHECK ENGINE LIGHT COMES ON AND THEN BRING IT INTO BE CHECKED (100.00). CHECK ENGINE LIGHT CAME ON 3 DAYS LATER, I HAD A LITTLE COMPUTER IT READ CODE P0744, TORQUE CONVERTER "
— Ford Edge owner, 08/27/2015
"PLEASE NOTE THIS IS A SAFETY HAZARD THAT OCCURS WHEN THE CAR IS DRIVING ONE THE INTERSTATE OR HIGHWAY AT 55-70 MPH. THE CAR WILL DECELERATE AND SLOWLY LOSE SPEED. I CAN SLAM THE GAS PEDAL TO THE FLOOR AND THE CAR WILL NOT ACCELERATE. THIS USUALLY HAPPENS IN VERY HOT WEATHER. IT ALWAYS HAPPENS IN MOT"
— Nissan Altima owner, 07/09/2016
Source: NHTSA Complaints Database
Most Reported Vehicles for P0744
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | NISSAN ROGUE | |
| 2 | NISSAN SENTRA | |
| 3 | NISSAN ALTIMA | |
| 4 | FORD FUSION | |
| 5 | FORD EDGE | |
| 6 | NISSAN PATHFINDER | |
| 7 | NISSAN MAXIMA | |
| 8 | NISSAN MURANO |
P0744 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Diagnostic Tips
- Scan all modules, save freeze-frame data, and clear unrelated history codes before focusing on P0744.
- Confirm whether companion codes are present first; they often identify the root cause sooner than the headline DTC.
- Prioritize inspection around power train and the most common failure path for this code family.
- Graph upstream vs downstream O2 sensor activity at warm idle and cruise; downstream should stay more stable than upstream.
- After each repair step, complete one drive cycle and verify readiness monitors instead of judging success after a quick idle test.
- If the code keeps returning on high-incidence platforms (for example NISSAN ROGUE), check TSB patterns and wiring/connector fitment before major part replacement.
Common Mistakes to Avoid
- ❌ Skipping freeze-frame review and losing the exact RPM/load conditions when the fault set.
- ❌ Installing a catalytic converter before ruling out upstream fueling/misfire conditions that can kill the new unit.
- ❌ Clearing P0744 and returning the car before monitors complete — this often creates repeat visits.
- ❌ Treating intermittent wiring or connector faults as permanent component failure without wiggle testing.
Frequently Asked Questions
What is a shift solenoid?
Can I drive in limp mode?
How much for solenoid replacement?
Can fluid change fix it?
Reported Repair Costs for P0744
Based on 4 owner-reported repair costs from NHTSA complaints.
⚠️ These are owner-reported costs, not estimates. Actual costs vary by location, labor rates, and root cause. Source: NHTSA complaints database.
What To Do Next
Possible Fixes
- 🔧 Replace shift solenoid or pack
- 🔧 Transmission fluid flush with manufacturer fluid
- 🔧 Repair wiring to transmission
- 🔧 Replace valve body
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.