P0740 on TOYOTA HIGHLANDER — Torque Converter Clutch Circuit/Open

Q: "What does P0740 mean on a TOYOTA HIGHLANDER?"

"P0740 indicates: Torque Converter Clutch Circuit/Open. This is a transmission code. 2 TOYOTA HIGHLANDER owners have reported this to NHTSA."

Q: "What are the most common causes of P0740 on TOYOTA HIGHLANDER?"

"Based on 2 NHTSA reports, the most commonly cited components are: Power Train. These percentages are based on the component field in owner complaints."

Q: "Is P0740 serious on my TOYOTA HIGHLANDER?"

"Of 2 NHTSA reports for this code on TOYOTA HIGHLANDER, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my TOYOTA HIGHLANDER shows P0740?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

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.

2 TOYOTA HIGHLANDER owners have reported this issue to NHTSA across model years 2018-2019. Most reports come from the 2018, 2019 model years. The most commonly reported component is Power Train (100.0% of reports).

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"

— 2018 TOYOTA HIGHLANDER owner · POWER TRAIN · Filed 09/27/2025

"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."

— 2019 TOYOTA HIGHLANDER owner · POWER TRAIN · Filed 01/22/2026

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'18

1

'19

Common Causes on TOYOTA HIGHLANDER

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN 100%

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.

Frequently Asked Questions

What does P0740 mean on a TOYOTA HIGHLANDER? ▾

P0740 indicates: Torque Converter Clutch Circuit/Open. This is a transmission code. 2 TOYOTA HIGHLANDER owners have reported this to NHTSA.

What are the most common causes of P0740 on TOYOTA HIGHLANDER? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Power Train. These percentages are based on the component field in owner complaints.

Is P0740 serious on my TOYOTA HIGHLANDER? ▾

Of 2 NHTSA reports for this code on TOYOTA HIGHLANDER, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my TOYOTA HIGHLANDER shows P0740? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

P0740 on Other Vehicles

→ All codes reported on TOYOTA HIGHLANDER