P0742 on Hyundai
Torque Converter Clutch Circuit Stuck On
P0742 on Hyundai vehicles indicates torque converter clutch circuit stuck on. Au7o has documented this code across 1 Hyundai model — most commonly on Palisade. P0742 means the torque converter clutch (TCC) circuit is stuck on, meaning the lockup clutch that mechanically links the engine to the transmission stays engaged when it should release. The computer commands the clutch on and off, and when it detects the converter clutch remaining applied, it sets this code. The classic symptom is the engine stalling when coming to a stop, similar to driving a manual without pushing the clutch in, along with possible harsh shifts or poor fuel economy. It points to a hydraulic or solenoid problem inside the transmission rather than the engine.
Common Causes of P0742
- •Stuck or failed torque converter clutch solenoid
- •Stuck valve in the valve body (TCC apply valve)
- •Contaminated or degraded transmission fluid
- •Internal transmission hydraulic leak holding the clutch on
- •Wiring or connector fault to the TCC solenoid
- •Faulty torque converter
- •Dirty or clogged transmission filter
P0742 on Hyundai by Model
Hyundai Palisade(1 issue)
- 8-Speed Automatic Harsh Shifting / Delayed Downshift2020-2025
The 8-speed automatic transmission in the Palisade can exhibit harsh 1-2 and 2-3 upshifts, delayed downshifts when passing, and occasional harsh engagement from park to drive. The TCM calibration is the primary issue, though some cases involve valve body wear. Hyundai has released multiple software updates to improve shift quality.
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View P0742 across all makes →Frequently Asked Questions
What does P0742 mean on Hyundai?▼
P0742 stands for "Torque Converter Clutch Circuit Stuck On." P0742 means the torque converter clutch (TCC) circuit is stuck on, meaning the lockup clutch that mechanically links the engine to the transmission stays engaged when it should release. The computer commands the clutch on and off, and when it detects the converter clutch remaining applied, it sets this code. The classic symptom is the engine stalling when coming to a stop, similar to driving a manual without pushing the clutch in, along with possible harsh shifts or poor fuel economy. It points to a hydraulic or solenoid problem inside the transmission rather than the engine. On Hyundai specifically, this code is documented across 1 model.
What causes P0742 on Hyundai vehicles?▼
Common causes on Hyundai: Stuck or failed torque converter clutch solenoid, Stuck valve in the valve body (TCC apply valve), Contaminated or degraded transmission fluid, Internal transmission hydraulic leak holding the clutch on, Wiring or connector fault to the TCC solenoid. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0742 on a Hyundai?▼
Repair costs vary widely depending on the root cause and specific Hyundai model.
Which Hyundai models have P0742 documented?▼
Au7o has documented P0742 on 1 Hyundai model: Palisade.