P0740 on Honda
Torque Converter Clutch Circuit Malfunction
P0740 on Honda vehicles indicates torque converter clutch circuit malfunction. Au7o has documented this code across 9 Honda models — most commonly on Accord, Civic, Crosstour. This code indicates a malfunction in the torque converter clutch (TCC) circuit of an automatic transmission. The torque converter clutch mechanically locks the engine to the transmission at cruising speed to improve fuel economy and reduce slippage, and it is engaged by a solenoid controlled by the transmission computer. The code sets when the computer detects an electrical problem with the clutch circuit or sees that the clutch is not engaging or holding as expected. Common signs include slipping, shuddering, poor fuel economy, or stalling when coming to a stop. Typical repair costs on Honda range from $80 to $7,000, depending on the specific model and root cause.
Common Causes of P0740
- •Faulty torque converter clutch (TCC) solenoid
- •Low or contaminated transmission fluid
- •Wiring or connector fault in the TCC circuit
- •Worn or failing torque converter
- •Valve body wear or sticking valves
- •Internal transmission electrical short
- •Faulty transmission control module
P0740 on Honda by Model
Honda Accord(2 issues)
- ZF 9-Speed Transmission Rough Shifting, Shudder, and Hesitation (2.0T)2018-2022
The 10th generation Accord 2.0T uses the ZF 9HP48 9-speed automatic transmission - the same unit that caused widespread complaints in the Honda Pilot (2016-2019) and Acura TLX/MDX. Software-controlled dog clutches are incompatible with Honda's original calibration, causing violent shuddering, harsh downshifts (especially 2nd-3rd gear), hesitation accelerating from stops, and torque converter shudder between 20-65 mph. Honda issued multiple TSBs. The 10th gen 1.5T uses a different transmission (CVT or 6-speed) and does NOT share this issue. 2.0T models are exclusively affected.
- CVT Start Clutch Juddering2013-2015
Early Honda Accord CVT transmissions suffer from widespread start clutch juddering caused by a manufacturing defect. The issue causes shaking or juddering during acceleration, especially from a stop. Honda acknowledged the problem and extended the warranty to 100,000 miles or 10 years for affected VINs.
Honda Civic(1 issue)
- Automatic Transmission Failure and Harsh Shifting2000
Numerous powertrain complaints describe automatic transmission failure with little warning, including hard shifting, slipping, delayed engagement, loss of acceleration, and torque converter circuit faults. Several owners reported failures at relatively modest mileage, making this one of the clearest expensive mechanical patterns in early 2000 Civics.
Honda Crosstour(1 issue)
- Transmission Shudder and Hard Shifting2010-2015
Honda Crosstour (2010-2015) owners report transmission shuddering, hard shifting, slipping gears, and hesitation during acceleration. The 5-speed automatic transmission experiences torque converter shudder at low speeds (15-35 mph) and harsh shifting between gears. Honda issued software updates for torque converter control, but many owners report issues persist. Transmission fluid flush may help temporarily.
Honda Fit(1 issue)
- CVT Transmission Problems (3rd Gen)2015-2020
New CVT in 3rd gen Fit (2015-2020) had significant issues, particularly 2015-2016. Hesitation, shuddering during acceleration, whining/howling noise from transmission. Honda addressed some issues with software updates. Transmission cooler addition ($80-150) reportedly prevents issues according to some owners. CRITICAL: Use ONLY Honda HF-F CVT fluid ($35-50/quart) - other fluids void warranty and cause damage. Change CVT fluid every 30,000 miles religiously.
Honda HR-V(1 issue)
- CVT Transmission Shuddering and Judder2016-2022
The 2016-2022 Honda HR-V CVT (Continuously Variable Transmission) experiences shuddering, judder, hesitation, and premature belt deterioration. Symptoms include vibrations during acceleration (especially 15-35 mph), delayed engagement, and strange whining/grinding noises. Honda extended the CVT warranty to 7 years/150,000 miles for 2016-2020 models due to premature belt wear. If caught early, CVT fluid replacement can help, but severe cases require complete CVT replacement ($3,000-5,000).
Honda Insight(1 issue)
- CVT Transmission Judder and Failure (Second Gen)2010-2014
The 2010-2014 Honda Insight (second generation) CVT transmission experiences judder, shuddering, knocking noise during acceleration, and complete failure. Early CVT steel belt failures were identified. When CVT fails, the green "D" indicator on dash blinks. The transmission shudders at low speeds (15-35 mph) and makes knocking noises when shifting or accelerating. Honda extended CVT warranty to 10yr/150k miles on some models. CVT replacement: $3,000-5,000.
Honda Odyssey(1 issue)
- Torque Converter Shudder (6-Speed Auto)2011-2017
Judder from torque converter lock-up clutch felt while driving between 20-60 mph. Honda determined the judder was caused by deteriorated transmission fluid exposed to intermittent high heat loads under specific driving conditions. Most noticeable during light acceleration when torque converter attempts to lock up.
Honda Passport(2 issues)
- Highway Vibration and Wobble (45-65 MPH)2019-2023
Honda Passport owners report annoying vibration and wobble at highway speeds (45-65 mph). The vibration is cyclical, often felt through the steering wheel, floor, and seats. Common causes include: wheel balance issues (OEM wheels are finicky), tire cupping/uneven wear, driveshaft imbalance, transmission torque converter shudder, and worn suspension bushings. Some owners report Honda dealers dismissing it as "normal characteristic" despite it being clearly abnormal. Road force balancing (not regular balancing) often fixes tire-related vibration.
- Automatic Transmission Torque Converter Clutch Shudder and 2nd-Gear Failure2000-2002
The first-generation Passport's 4-speed automatic is widely documented for torque-converter clutch shudder, slipping, harsh shifts, and eventual hard-part failure, especially loss of 2nd gear. Honda issued service information tied to Isuzu-sourced driveline components, and owner complaints frequently describe the vehicle revving without acceleration or dropping into limp behavior after warm-up. Once clutch material contaminates the fluid, the problem often progresses quickly from intermittent shudder to a full rebuild or replacement.
Honda Pilot(1 issue)
- Automatic Transmission 2nd-Gear Overheating and Torque Converter Failure2003-2004
Early first-generation Pilot models share a well-documented 5-speed automatic transmission weakness with other Honda/Acura trucks of the era. Honda issued a safety recall to install an oil jet intended to improve lubrication/cooling of second gear because inadequate lubrication could lead to gear overheating, discoloration, breakage, and eventual transmission failure or lockup. Owners commonly report slipping, harsh shifting, flashing D4, burnt fluid, and complete loss of drive, sometimes even after the recall if damage had already begun.
Looking for P0740 on a different make?
View P0740 across all makes →Frequently Asked Questions
What does P0740 mean on Honda?▼
P0740 stands for "Torque Converter Clutch Circuit Malfunction." This code indicates a malfunction in the torque converter clutch (TCC) circuit of an automatic transmission. The torque converter clutch mechanically locks the engine to the transmission at cruising speed to improve fuel economy and reduce slippage, and it is engaged by a solenoid controlled by the transmission computer. The code sets when the computer detects an electrical problem with the clutch circuit or sees that the clutch is not engaging or holding as expected. Common signs include slipping, shuddering, poor fuel economy, or stalling when coming to a stop. On Honda specifically, this code is documented across 9 models.
What causes P0740 on Honda vehicles?▼
Common causes on Honda: Faulty torque converter clutch (TCC) solenoid, Low or contaminated transmission fluid, Wiring or connector fault in the TCC circuit, Worn or failing torque converter, Valve body wear or sticking valves. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0740 on a Honda?▼
Repair costs on Honda range from $80 to $7,000, depending on the specific model and root cause.
Which Honda models have P0740 documented?▼
Au7o has documented P0740 on 9 Honda models: Accord, Civic, Crosstour, Fit, HR-V, Insight, Odyssey, Passport, Pilot.