P0730 on MINI
Incorrect Gear Ratio
P0730 on MINI vehicles indicates incorrect gear ratio. Au7o has documented this code across 2 MINI models — most commonly on Cooper S, Countryman. 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 MINI range from $300 to $3,000, 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 MINI by Model
MINI Cooper S(1 issue)
- Premature Clutch and Dual-Mass Flywheel Failure2007-2020
Manual transmission MINI Cooper S models experience premature clutch and dual-mass flywheel (DMF) failure, often before 60k miles. The DMF springs weaken causing chatter and vibration, and the clutch disc wears prematurely due to the turbo engine's torque characteristics.
MINI Countryman(1 issue)
- Aisin 8-Speed Automatic Transmission Shudder2017-2025
The F60 Countryman's Aisin AW TF-81SC/AF40 8-speed automatic transmission develops a shudder during light acceleration, particularly between 30-50 mph. The torque converter lockup clutch is the primary cause.
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View P0730 across all makes →Frequently Asked Questions
What does P0730 mean on MINI?▼
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 MINI specifically, this code is documented across 2 models.
What causes P0730 on MINI vehicles?▼
Common causes on MINI: 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 MINI?▼
Repair costs on MINI range from $300 to $3,000, depending on the specific model and root cause.
Which MINI models have P0730 documented?▼
Au7o has documented P0730 on 2 MINI models: Cooper S, Countryman.