P0730 on Hyundai
Incorrect Gear Ratio
P0730 on Hyundai vehicles indicates incorrect gear ratio. Au7o has documented this code across 10 Hyundai models — most commonly on Accent, Elantra, Genesis Coupe. This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. Typical repair costs on Hyundai range from $150 to $6,000, depending on the specific model and root cause.
Common Causes of P0730
- •Low or contaminated transmission fluid
- •Worn clutches or bands (internal slipping)
- •Faulty shift solenoids
- •Dirty or sticking valve body
- •Faulty input or output speed sensor
- •Internal hydraulic/line pressure problems
- •Torque converter problems
- •General high-mileage transmission wear
P0730 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(2 issues)
- Dual Clutch Transmission (DCT) Shudder and Failure2016-2020
The 7-speed dual clutch transmission (DCT) in Elantra Sport and Elantra GT models suffers from consistent problems including shuddering, hesitation during acceleration, and sudden loss of power. The clutch pack is not replaceable, requiring full transmission replacement. A class action resulted in a $41.2 million settlement.
- 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.
Hyundai Genesis Coupe(1 issue)
- Concentric Slave Cylinder Failure (Manual Transmission)2010-2016
The concentric slave cylinder (CSC) in manual-transmission Genesis Coupes fails prematurely, causing soft or spongy clutch pedal feel and eventually inability to disengage the clutch. The internal seal leaks, allowing fluid to contaminate the clutch disc. Replacement requires transmission removal, making it a labor-intensive repair.
Hyundai Ioniq(1 issue)
- 6-Speed DCT Harsh Shifting, Shuddering, and Hesitation2017-2022
The Hyundai Ioniq Hybrid and PHEV use a 6-speed dual-clutch transmission (DCT) that is prone to harsh shifting, shuddering during low-speed acceleration, and hesitation from a stop. The defect involves the transmission control module (TCM) and the dual-clutch mechanism itself. The clutch can slip, causing the transmission to hesitate or shudder, particularly in hot weather when the clutch overheats. Service records show broken pins and jammed shafts within the DCT components. Hyundai acknowledged the issue by placing warning cards near the gear selector in some vehicles. The defect prevents proper acceleration from a stop, which is dangerous in traffic.
Hyundai Kona(1 issue)
- 7-Speed DCT Shudder and Delayed Engagement2018-2023
Kona models with the 1.6L turbo and 7-speed DCT experience shuddering during low-speed driving, delayed engagement from a stop, and lurching during parking maneuvers. The dry dual-clutch design struggles with heat and wear. Hyundai extended DCT warranty to 10 years/100,000 miles after class-action pressure.
Hyundai Santa Cruz(1 issue)
- 8-Speed DCT Overheating Under Load / Towing2022-2025
The 8-speed wet dual-clutch transmission (DCT) on the 2.5L turbo Santa Cruz can overheat when towing near its 5,000 lb capacity or during spirited driving in warm weather. The transmission overheating warning forces the vehicle into limp mode. The DCT cooling system is undersized for heavy-duty use.
Hyundai Sonata(1 issue)
- Dual-Clutch Transmission (DCT) Shudder/Hesitation2015-2019
Sonatas equipped with the dual-clutch transmission can experience shuddering, hesitation, and jerky engagement at low speeds. The DCT can feel rough in stop-and-go traffic. This is a characteristic of the dry-clutch DCT design.
Hyundai Tucson(1 issue)
- 7-Speed DCT Transmission Shudder and Hesitation2016-2021
The 7-speed dual-clutch transmission (DCT) paired with the 1.6L turbo engine in Tucson models suffers from shuddering during low-speed maneuvers, hesitation from a stop, and jerky shifts. The dry clutch design is prone to premature wear. Hyundai extended the DCT warranty to 10 years/100,000 miles under a settlement.
Hyundai Veloster(2 issues)
- 6-Speed DCT Premature Clutch Failure2012-2017
The 6-speed dry DCT in the Veloster Turbo is prone to premature clutch wear and failure, often before 60,000 miles. Symptoms include slipping, shuddering, and complete loss of drive. The dry clutch design generates excessive heat in stop-and-go traffic. Hyundai extended DCT warranty coverage after numerous complaints.
- Smartstream IVT/CVT Hesitation, Judder, and Limp-Mode from Transmission Control Logic or Internal Faults2019-2021
Owners of 2.0-liter Velosters equipped with Hyundai's IVT (CVT) report hesitation from a stop, shuddering under light acceleration, delayed engagement, warning messages, and in some cases reduced-power or limp-home behavior. Hyundai issued service information covering DTCs related to transmission pump/pressure and ratio monitoring, indicating this is more than isolated owner perception. Complaints commonly describe the car feeling unsafe when merging or crossing traffic because throttle input does not produce immediate movement.
Hyundai Venue(1 issue)
- IVT (CVT) Judder and Hesitation2020-2026
The Hyundai Venue uses an IVT (Intelligent Variable Transmission), which is Hyundai's version of a CVT. The IVT can exhibit judder during low-speed acceleration, hesitation when merging or passing, and a rubber-band effect during throttle changes. The transmission programming prioritizes fuel economy, causing noticeable delays between throttle input and vehicle response. Hyundai has released TCM software updates to improve responsiveness for some model years.
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View P0730 across all makes →Frequently Asked Questions
What does P0730 mean on Hyundai?▼
P0730 stands for "Incorrect Gear Ratio." This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. On Hyundai specifically, this code is documented across 10 models.
What causes P0730 on Hyundai vehicles?▼
Common causes on Hyundai: Low or contaminated transmission fluid, Worn clutches or bands (internal slipping), Faulty shift solenoids, Dirty or sticking valve body, Faulty input or output speed sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0730 on a Hyundai?▼
Repair costs on Hyundai range from $150 to $6,000, depending on the specific model and root cause.
Which Hyundai models have P0730 documented?▼
Au7o has documented P0730 on 10 Hyundai models: Accent, Elantra, Genesis Coupe, Ioniq, Kona, Santa Cruz, Sonata, Tucson, Veloster, Venue.