OBD2 Car ScannerWhat does P0742 mean?
P0742 stands for Torque Converter Clutch Circuit Stock On. The transmission control system has found a problem. You may notice harsh, late or missing gear changes.
Powertrain codes cover the engine, transmission and emissions. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.
Common causes
- Low or old transmission fluid
- Faulty shift solenoid
- Faulty transmission speed or temperature sensor
- Damaged wiring
- Internal transmission wear
What to do
- Read all stored and pending codes with a scanner. Several codes together often point to one cause.
- Note the freeze frame data (speed, temperature, load) recorded when the code was set.
- Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
- Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.
Read this code from your own car
Plug in a cheap ELM327 adapter and the app shows every fault code, what it means and how to fix it.
Frequently asked questions
What does P0742 mean?
P0742 means “Torque Converter Clutch Circuit Stock On”. It belongs to the transmission group: The transmission control system has found a problem. You may notice harsh, late or missing gear changes.
Is it safe to drive with P0742?
Avoid driving long distances. This kind of fault can cause damage or affect safety, so get it checked as soon as possible.
How do I clear P0742?
Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.
Related codes
- P073EUnable to Engage Reverse
- P073FUnable to Engage Gear 1
- P0740Torque Converter Clutch Circuit Malfunction
- P0741Torque Converter Clutch Circuit Performance or Stuck Off
- P0743Torque Converter Clutch Circuit Electrical
- P0744Torque Converter Clutch Circuit Intermittent
- P0745Pressure Control Solenoid A Malfunction
- P0746Pressure Control Solenoid A Performance or Stuck Off
Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.