P0730 on Mitsubishi: How to Diagnose & Fix
Incorrect Gear Ratio
2 Mitsubishi models · 2 documented issues · 2 critical · $3,000-$5,000 repair
P0730 on Mitsubishi by model: symptoms, diagnosis and fix
Mitsubishi's bulletin says CVT-8 transmissions may shudder or surge, possibly caused by poor reaction of the hydraulic pressure circuit. With continued driving the CVT belt may slip repeatedly when accelerating and abrasion powder may enter the hydraulic circuit, turning on a warning light with P0776, P0730, P0741, P084A, P0969 or P2719; owners may describe it as engine flare, lack of acceleration or car shake. Applies to: 2022-2024 Outlander with the 2.5L engine and 2016-2020 Outlander with the 2.4L engine, with F1CJC/W1CJC (CVT-8) transmissions. It excludes every Outlander Plug-in Hybrid.
Common Symptoms
- Transmission shudder or surge
- Engine flare or poor acceleration
- Transmission warning light
How to Fix
On a customer complaint, a Mitsubishi dealer follows TSB-20-23-001REV4: confirms recall SR-16-006 is complete where it applies (2016 models), saves the DTC list and freeze-frame data, opens a Techline case and, for P0776 or P084A, inspects the CVT belt and pulleys with a borescope. Depending on diagnosis and Techline instruction, the valve body and/or the CVT-8 transaxle is repaired or replaced and the CVT ECU coding in TSB-15-23-001 is performed; a replacement transmission is ordered only with Techline or DPSM approval. The bulletin lists powertrain coverage (10 years/100,000 miles for the original owner, 5 years/60,000 miles for later owners), counted from the original in-service date. Normal warranty rules apply; this is not a recall or a promise of free repair.
Sources for this issue (2)
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. 2015-2016 models had a separate recall (16V-563 / SR-16-006) that reprogrammed the CVT control unit to fix a delay in accelerating.
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-20-23-001REV: Potential Transmission Shudder/Surge With Possible DTC (CVT-8)tsb
- Mitsubishi Transmission Lawsuits | CVT Problems | ClassAction.orgarticle
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 2 models: Outlander, 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.