P0742: Torque Converter Clutch Circuit Stuck On
What Does P0742 Mean?
P0742 is a diagnostic trouble code indicating: Torque Converter Clutch Circuit Stuck On. This code relates to the transmission system. It has been reported in NHTSA complaints across 2 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 P0742
- ⚠️ 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
P0742 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"JULY 2025 MY 2012 FORD EXPEDITION THREW A P0742 CODE FOR A STUCK TORQUE CONVERTER CLUTCH. THE VEHICLE HAD JUST UNDER 150K MILES AND STARTED TO JERK IN AND OUT OF GEAR AND THE WRENCH LIGHT ILLUMINATED SO I, THANKFULLY WAS GOING APPROXIMATELY 45 MPH WHEN IT HAPPENED AND WAS ABLE TO PULL THE VEHICLE OV"
— Ford Expedition owner, 07/24/2025
"I just purchased (2 months ago) a 2012 Ford Expedition EL 5.4l v8 from a private party. I wish I would have done more research as I am ALREADY EXPERIENCING TRANSMISSION ISSUES THAT I BELIEVE ARE DIRECTLY RELATED TO THE VEHICLES LEAD FRAME RECALL. IT THREW A P0742 CODE ON ME Torque Converter Clutch "
— Ford Expedition owner, 07/24/2025
"My 2022 Pathfinder had 34,725 miles on it when I left for the grocery store, on the way while driving on the highway I got an alert on my dash saying "check shift level position", which that seemed normal & fine, and vehicle was still driving normally at this point. That alert then went away as I wa"
— Nissan Pathfinder owner, 09/30/2024
Source: NHTSA Complaints Database
Most Reported Vehicles for P0742
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | FORD EXPEDITION | |
| 2 | NISSAN PATHFINDER |
P0742 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Diagnostic Tips
- Check fluid level and condition FIRST
- Multiple codes suggest valve body or internal damage
- Monitor solenoid duty cycle with scan tool
- Solenoids often accessible by removing pan
Common Mistakes to Avoid
- ❌ Replacing solenoid without flushing contaminated fluid
- ❌ Using aftermarket fluid instead of manufacturer-specified
- ❌ Driving in limp mode for extended periods
Frequently Asked Questions
What is a shift solenoid?
Can I drive in limp mode?
How much for solenoid replacement?
Can fluid change fix it?
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.