P0730 on Mitsubishi: How to Diagnose & Fix
Incorrect Gear Ratio
1 Mitsubishi model · 2 documented issues · 2 critical · $3,000-$5,000 repair
P0730 on Mitsubishi by model: symptoms, diagnosis and fix
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.
Common Symptoms
- shuddering or jerking during acceleration
- hesitation shifting into drive or reverse
- whining or whirring noise
- RPM rises but car does not accelerate (slipping)
How to Fix
Replace CVT fluid on a shortened interval (roughly every 30,000-60,000 miles rather than 'lifetime'). Persistent shudder may require a valve body or full CVT replacement. Earlier model years had a separate recall (16V-563) for a CVT control module causing delayed gear engagement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mitsubishi CVTF-J4 transmission fluid, 1 quart (MZ321212)
Do not use this link to override a 2011 CVTF-J1 label/specification, and do not substitute ATF; verify required quantity and service procedure before ordering.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (6)
- Mitsubishi Outlander Sport CVT Transmission Problems, repair costs - CVT Mechanicarticle
- 2012 Outlander Sport CVT Transmission Failed - Mitsubishi Enthusiast Forumsforum
- Mitsubishi Outlander Sport recalls and NHTSA complaint data (2011-2024)article
- NHTSA Recall 22V-563: Inappropriate CVT ECU Software Programming - 2019-2022 Mitsubishi Outlander Sportrecall
- Mitsubishi TSB MC-10177379: Potential Transmission Shudder/Surge (CVT)tsb
- Mitsubishi Transmission Lawsuits | CVT Problems | ClassAction.orgarticle
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.
Common Symptoms
- 2019-2022 VIN, build date, CVT and mechanical-key configuration verified
- recall completion and CVT-ECU software level documented
- DTC and any existing engine-damage findings preserved
How to Fix
Check the VIN, build date, CVT and mechanical-key configuration for 22V563000 / SR-22-004. An authorized Mitsubishi dealer reprograms the CVT-ECU with the updated software free of charge and verifies the current software and DTC state. Do not buy a CVT-ECU, transmission or engine from this page; recall eligibility, software level and any existing damage require dealer documentation.
Sources for this issue (3)
P0730 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0730 mean on a 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 it is documented across 1 model: Outlander Sport.
What are the most common causes of P0730?
The most common causes of P0730 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P0730 on a Mitsubishi?
Published repair estimates on Mitsubishi range from $3,000 to $5,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0730 on a different make?
View P0730 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.