P0730 on Mitsubishi
Incorrect Gear Ratio
P0730 on Mitsubishi vehicles indicates incorrect gear ratio. Au7o has documented this code across 1 Mitsubishi model — most commonly on Outlander Sport. 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 Mitsubishi range from $3,000 to $5,000, 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 Mitsubishi by Model
Mitsubishi Outlander Sport(2 issues)
- CVT software defect causes engine over-rev and stall at highway speed2019-2022
Mitsubishi recall bulletin SR-22-004 and NHTSA recall 22V563000 cover certain 2019-2022 Outlander Sport vehicles with a CVT and mechanical-key ignition. A temporary ignition-power-supply signal loss of at least 0.1 second can create an erroneous gear-ratio setting; above 62 mph, the CVT can drop to its lowest ratio, produce engine over-rev and engine damage, and the engine can stall. The bulletin limits the affected build window to July 31, 2018 through May 11, 2022 and requires VIN confirmation.
- CVT shudder, slipping, and premature failure2011-2022
The Jatco-built CVT used across most Outlander Sport years is prone to shuddering, jerking, hesitation when shifting from park to drive/reverse, whining or whirring noise during acceleration, and slipping (engine revs without proportional acceleration). Degraded CVT fluid and belt/chain wear are the primary drivers, and neglected fluid accelerates failure. Powertrain is consistently the most-complained-about area in NHTSA data for this model.
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View P0730 across all makes →Frequently Asked Questions
What does P0730 mean on Mitsubishi?▼
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 Mitsubishi specifically, this code is documented across 1 model.
What causes P0730 on Mitsubishi vehicles?▼
Common causes on Mitsubishi: 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 Mitsubishi?▼
Repair costs on Mitsubishi range from $3,000 to $5,000, depending on the specific model and root cause.
Which Mitsubishi models have P0730 documented?▼
Au7o has documented P0730 on 1 Mitsubishi model: Outlander Sport.