P0740 on Hyundai: How to Diagnose & Fix
Torque Converter Clutch Circuit Malfunction
1 Hyundai model · 1 documented issue · 1 critical · $150-$4,000 repair
P0740 on Hyundai by model: symptoms, diagnosis and fix
The IVT (CVT) transmission in 2020+ Accent models can fail prematurely, with symptoms ranging from shuddering and slipping to complete loss of drive. The chain and pulley system wears, especially with aggressive driving or neglected fluid changes. Rebuilds are typically not cost-effective given the vehicle's value.
Common Symptoms
- Shuddering at low speeds
- Rubber-band effect on acceleration
- Droning noise at highway speed
- Complete loss of drive
- Transmission warning light
How to Fix
Regular IVT fluid changes every 30,000 miles (not lifetime as Hyundai suggests) using SP-CVT1 fluid. If shuddering, a fluid drain and fill may resolve mild cases. Severe cases require transmission replacement ($2,500-4,000). Given the Accent's value, a used transmission ($800-1,200 installed) may be more practical.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Hyundai 00232-19081 SP-CVT1 IVT fluidOEMHyundai 00232-19081 SP-CVT1
factory-specified IVT fluid for a correctly diagnosed service or post-replacement fill Fitment/availability: 2020-2022 U.S. Hyundai Accent 1.6L equipped with IVT; Hyundai TSB 20-AT-010H specifies SP-CVT1 part 00232-19081.
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Owner tips & cautions
- TipChange IVT fluid every 30,000 miles regardless of what the owners manual says - this is the single best thing you can do for longevity
- WarningIf the transmission starts slipping, get it inspected immediately - IVT damage progresses rapidly once it starts
Sources for this issue (3)
P0740 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 P0740 mean on a Hyundai?
P0740 stands for "Torque Converter Clutch Circuit Malfunction." This code indicates an electrical malfunction in the torque converter clutch (TCC) solenoid 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 open, short, or out-of-range condition in the TCC solenoid circuit. A clutch that is commanded on but slips or won't hold sets a separate code (P0741). Common signs include the converter not locking up (higher cruise RPM and poor fuel economy), a check engine light, or stalling when coming to a stop if the clutch stays applied. On Hyundai it is documented across 1 model: Accent.
What are the most common causes of P0740?
The most common causes of P0740 are: Faulty torque converter clutch (TCC) solenoid, Wiring or connector fault in the TCC circuit (open or short), Transmission case connector or internal harness damage, including fluid intrusion, Internal transmission electrical short, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P0740 on a Hyundai?
Published repair estimates on Hyundai range from $150 to $4,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.