P0742 on Nissan: How to Diagnose & Fix
Torque Converter Clutch Circuit Stuck On
1 Nissan model · 1 documented issue
P0742 on Nissan by model: symptoms, diagnosis and fix
The 2023+ Nissan Z with the 6-speed manual transmission reports synchro issues (particularly 3rd and 4th gear) and premature clutch wear. Some owners experience gear grinding, difficulty shifting, and clutch chatter. TSB NTB23-012 addresses rev-matching issues and shifting concerns. The 9-speed automatic also has reports of harsh shifting.
Common Symptoms
- Grinding when shifting to 3rd or 4th gear
- Clutch chatter on engagement
- Difficulty downshifting at low speed
- Rev-match system malfunction
- Harsh or delayed automatic shifts
How to Fix
For manual: Ensure proper break-in procedure (gentle shifts for first 1,000 miles). Dealer may apply TCM software update for rev-match issues. If synchros are damaged, replacement under warranty. For automatic: TCM reprogram per TSB NTB23-012. Cost if out of warranty: $800-2,500.
Sources for this issue (1)
P0742 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0742 mean on a Nissan?
P0742 stands for "Torque Converter Clutch Circuit Stuck On." P0742 means the torque converter clutch (TCC) circuit is stuck on, meaning the lockup clutch that mechanically links the engine to the transmission stays engaged when it should release. The computer commands the clutch on and off, and when it detects the converter clutch remaining applied, it sets this code. The classic symptom is the engine stalling when coming to a stop, similar to driving a manual without pushing the clutch in, along with possible harsh shifts or poor fuel economy. It points to a hydraulic or solenoid problem inside the transmission rather than the engine. On Nissan it is documented across 1 model: Z.
What are the most common causes of P0742?
The most common causes of P0742 are: Stuck or failed torque converter clutch solenoid, Stuck valve in the valve body (TCC apply valve), Contaminated or degraded transmission fluid, Internal transmission hydraulic leak holding the clutch on, Wiring or connector fault to the TCC solenoid, Faulty torque converter, Dirty or clogged transmission filter. The specific cause varies by vehicle.
How much does it cost to fix P0742 on a Nissan?
Repair costs vary widely with the root cause and Nissan model; each issue on this page carries its own estimate where one is published.
Looking for P0742 on a different make?
View P0742 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.