P0742: Torque Converter Clutch Circuit Stuck On
64 vehicles · 15 makes
P0742 is an OBD-II diagnostic trouble code meaning “Torque Converter Clutch Circuit Stuck On.” The torque converter clutch is not releasing when commanded. Can cause stalling when coming to a stop. This code appears across 64 vehicle models from 15 manufacturers.
Common Causes
Diagnostic Tools
To diagnose P0742, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (64)
10L80 Transmission Harsh Shifting and Shudder
8L90 Transmission Shudder and Harsh Shifting
8-Speed / 9-Speed Transmission Shudder and Harsh Shifting
10-Speed Transmission Adaptive Learning and Shift Quality
8/10-Speed Transmission Shudder
8-Speed Transmission Shudder/Harsh Shifts
8-Speed Automatic Transmission Shudder (8L90/8L45)
Transmission Shudder and Torque Converter Failure
9-Speed Transmission Shift Quality Issues
4T65E Automatic Transmission Failure
4T65-E Transmission Failure and Hard Shifts
10L80 10-Speed Transmission Harsh Shifting
9-Speed Automatic Transmission Issues
8L90 Transmission Shudder
4L60E Automatic Transmission Failure
6T40 Transmission Shudder (Gen 1)
4T60E Automatic Transmission Failure
Driveline Vibration at Low Speed - C7
8L90 8-Speed Transmission Shudder
9-Speed Automatic Transmission Shudder and Harsh Shifting
4-Speed Automatic Transmission Failure (4T65E)
ZF 8-Speed Transmission Harsh Shifting
Automatic Transmission Slipping and Shifting Problems
62TE Transmission Solenoid Pack Failure
ZF 9-Speed Transmission Shifting Problems
62TE 6-Speed Transmission Failure (Gen 1)
948TE 9-Speed Transmission Calibration Issues
8-Speed (ZF 8HP) Transmission Issues
8-Speed (8HP) Transmission Harsh Shifts
62TE Transmission Slipping and Solenoid Failure
62TE Transmission Solenoid Pack Failure
ZF 8-Speed Transmission Harsh Shifting and Valve Body Failure
62TE Transmission Solenoid Pack and Valve Body Failure
42RLE 4-Speed Transmission Solenoid and Connector Failure
42RLE 4-Speed Transmission Solenoid Failure
9-Speed Transmission Calibration Issues
10-Speed Transmission Shudder/Harsh Shifts
10R80 10-Speed Automatic Harsh Shifting and Hesitation
10-Speed Transmission Shudder/Harsh Shifts
10-Speed Automatic Transmission Shudder
Rear Drive Unit (RDU) Chatter and Shudder During Low-Speed Turns - AWD Models
10R60 10-Speed Transmission Harsh Shifting
10-Speed Automatic Transmission Harsh Shifting
Torque Converter Shudder and Transmission Failure
AX4S/AX4N Automatic Transmission Failure
8-Speed/10-Speed Transmission Torque Converter Shudder
Allison 1000/2000 Transmission TCM Failure and Harsh Shifting
Transmission Torque Converter Shudder (8L90/10L80)
4L60E Automatic Transmission Failure
ZF 9-Speed Transmission Shudder and Harsh Shifting
Torque Converter Shudder (6-Speed Auto)
Highway Vibration and Wobble (45-65 MPH)
Transmission Parking Pawl Failure (Vehicle Rolls Away)
Transmission Shudder and Hard Shifting
9-Speed Transmission Rough Shifting and Hesitation
68RFE Automatic Transmission Failure When Towing
ZF 8-Speed Transmission Problems
Aisin AS69RC Transmission Overheating and Converter Shudder
ZF 8HP75 Transmission Harsh Shifting and Hesitation
ZF 9HP 9-Speed Automatic Transmission Problems
6-Speed Automatic Rough Shifting
8-Speed Automatic Transmission Shudder and Hesitation
4-Speed Automatic Transmission Shudder and Harsh Shifts
Transmission Shudder / Torque Converter Issues
Aisin AW55-50/51SN Transmission Failure and Solenoid Issues
Aisin TF-80SC 6-Speed Transmission Shudder and Valve Body Failure
8-Speed Automatic Delayed Engagement and Hesitation
FAQ
What does P0742 mean?
P0742 stands for "Torque Converter Clutch Circuit Stuck On." The torque converter clutch is not releasing when commanded. Can cause stalling when coming to a stop.
What are the most common causes of P0742?
The most common causes of P0742 are: TCC solenoid stuck closed, Valve body issue, Wiring short circuit, Contaminated fluid, Failed torque converter. The specific cause varies by vehicle.
How much does it cost to fix P0742?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0742?
Au7o has documented P0742 across 64 vehicle models from 15 manufacturers: Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Honda, Hyundai, Jeep, Kia, Mazda, Nissan, RAM, Toyota, Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.