P0740 on Hyundai
Torque Converter Clutch Circuit Malfunction
P0740 on Hyundai vehicles indicates torque converter clutch circuit malfunction. Au7o has documented this code across 2 Hyundai models — most commonly on Accent, Elantra. 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 Hyundai range from $150 to $5,500, 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 Hyundai by Model
Hyundai Accent(1 issue)
- IVT/CVT Transmission Failure and Shudder2017-2022
The IVT (CVT) transmission in 2017+ 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.
Hyundai Elantra(1 issue)
- IVT/CVT Transmission Failure and Power Loss2019-2023
The Smart Stream IVT (Intelligent Variable Transmission) in newer Elantras has experienced early failures, sometimes before reaching 20,000 miles. Issues include sudden power loss, check engine lights, and RPM fluctuations. Hyundai issued TSB 20-01-047H addressing transmission control module calibration issues.
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What does P0740 mean on Hyundai?▼
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 Hyundai specifically, this code is documented across 2 models.
What causes P0740 on Hyundai vehicles?▼
Common causes on Hyundai: 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 Hyundai?▼
Repair costs on Hyundai range from $150 to $5,500, depending on the specific model and root cause.
Which Hyundai models have P0740 documented?▼
Au7o has documented P0740 on 2 Hyundai models: Accent, Elantra.