P0740 on Toyota Highlander
Torque Converter Clutch Circuit/Open
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Toyota Highlander context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P0740.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What P0740 Means on Your Toyota Highlander
P0740 is a diagnostic trouble code indicating: Torque Converter Clutch Circuit/Open. This code relates to the transmission system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
Real Toyota Highlander Owner Reports
Source: NHTSA Complaints Database
"1)The following components failed:Symptoms and Diagnostic Trouble Codes TRANSMISSION P0741 - Torque Converter Clutch Circuit Performance/Stuck Off P2757 - Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off P2714 - Pressure Control Solenoid 'D' Performance/Stuck O"
"Vehicle experienced sudden loss of power and severe hesitation from a stop. Acceleration is extremely weak from approximately 0–20 mph, then returns to normal once moving. Traction control system automatically disables itself and check engine light illuminates."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on Toyota Highlander
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
-
1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
-
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
-
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.