P0740 on Kia
Torque Converter Clutch Circuit Malfunction
P0740 on Kia vehicles indicates torque converter clutch circuit malfunction. Au7o has documented this code across 3 Kia models — most commonly on Forte, Sedona, Seltos. 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 Kia 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 Kia by Model
Kia Forte(1 issue)
- CVT Shudder and Hesitation Under Acceleration2019-2024
The IVT (Intelligent Variable Transmission, Kia's name for their CVT) in the 2019-2024 Forte develops a shuddering sensation during light-to-moderate acceleration, particularly from stops and at speeds between 20-45 mph. The issue is caused by the CVT chain and pulley interface wearing irregularly. Kia has released multiple software updates to improve shift mapping and reduce the shudder sensation.
Kia Sedona(1 issue)
- Automatic Transmission Shudder and Harsh Shifting2015-2021
The 2015-2021 Sedona with the 6-speed automatic transmission develops shuddering during gear changes, harsh shifts, and delayed engagement. The torque converter lock-up clutch wears prematurely, and the transmission valve body develops stuck solenoids. Kia released multiple TCU software updates to improve shift quality. In severe cases, torque converter or complete transmission replacement is needed.
Kia Seltos(1 issue)
- CVT Hesitation and Jerking Under Load2021-2025
The Seltos equipped with the 2.0L engine and CVT (IVT) exhibits hesitation, jerking, and poor acceleration response, particularly when merging or climbing hills. The CVT struggles under load and can enter limp mode. Owners report the transmission feels sluggish compared to traditional automatics. Kia has released TCU software updates to improve response.
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View P0740 across all makes →Frequently Asked Questions
What does P0740 mean on Kia?▼
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 Kia specifically, this code is documented across 3 models.
What causes P0740 on Kia vehicles?▼
Common causes on Kia: 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 Kia?▼
Repair costs on Kia range from $150 to $5,500, depending on the specific model and root cause.
Which Kia models have P0740 documented?▼
Au7o has documented P0740 on 3 Kia models: Forte, Sedona, Seltos.