P0730: Incorrect Gear Ratio
127 vehicles · 25 makes
P0730 is an OBD-II diagnostic trouble code meaning “Incorrect Gear Ratio.” The transmission is not achieving the expected gear ratio. Usually indicates internal transmission problems like worn clutch packs or bands. This code appears across 127 vehicle models from 25 manufacturers.
Common Causes
Diagnostic Tools
To diagnose P0730, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (127)
S-Tronic (DSG) Mechatronic Unit Issues
S-Tronic DSG Transmission Issues (Mk2)
Multitronic CVT Transmission Failure
CVT Multitronic Transmission Failure and PRNDS Flashing on Front-Wheel-Drive A4
Supercharger Clutch and Isolator Failure (3.0T V6)
Automatic Transmission Harsh Shifting
S-Tronic DSG Transmission Issues (C7)
DSG Transmission Issues (7-Speed DQ500)
ZF 6HP26 Automatic Transmission Torque Converter Shudder and Failure
Transmission Mechatronic Unit Failure (8-Speed Tiptronic)
Supercharger Clutch and Isolator Failure (S7 3.0T)
Multitronic CVT Transmission Failure
DQ381 S-Tronic Mechatronic Unit Failure
S-Tronic (DSG) Dual-Clutch Transmission Issues
ZF 8HP Transmission Mechatronics Sleeve Failure
SMG III Hydraulic Pump Failure (M6 and SMG-Equipped 645Ci/650i)
ZF 6HP Transmission Mechatronic Sleeve & Valve Body Failure
Aisin 8-Speed Transmission Jerking
ZF 8HP Transmission Mechatronic Sleeve Leak
10-Speed Transmission Wheel Lock-Up (10L80)
6-Speed Automatic Transmission Turbine Shaft Fracture
CVT Transmission Shudder and Hesitation
CVT Transmission Shudder and Hesitation
Shifter Clip Failure - Vehicle Stuck in Park
Hybrid Transmission Wiring Harness Short (PHEV)
9-Speed Automatic Harsh Shifting and Hesitation
Transmission Harsh 3-4 Shift and Shudder (9-Speed)
Jatco CVT Overheating and Premature Failure
C635 Dual-Dry-Clutch Transmission (DDCT) Failure
W5A580 (NAG1) 5-Speed Transmission Water Contamination
Transmission Fluid Expulsion and Fire Risk - Recall
DCT Transmission Hesitation from Stop
DPS6 PowerShift Dual-Clutch Transmission Shudder, Hesitation, and Failure
MT82 Manual Transmission Grinding and Shifting Issues
MT82 Manual Transmission Grinding/Hard Shifts
Power Transfer Unit (PTU) Fluid Leak and Failure - AWD Models
Hybrid eCVT Transmission Shudder and Delayed Engagement
7-Speed Manual Transmission Grinding/Scraping Noise
CVT Transmission Shudder and Jerking (2020+ Hybrid)
CVT Transmission Shudder/Judder
Automatic Transmission Complete Failure (2nd Gen)
ZF 9-Speed Transmission Rough Shifting, Shudder, and Hesitation (2.0T)
ZF 9-Speed Transmission Rough Shifting and Hesitation
Vibration at Idle (In Gear)
CVT Start Clutch Juddering
CVT Transmission Problems (3rd Gen)
CVT Transmission Judder and Failure (Second Gen)
CVT Transmission Shuddering and Judder
Automatic Transmission 2nd-Gear Overheating and Torque Converter Failure
7-Speed DCT Transmission Shudder and Hesitation
7-Speed DCT Shudder and Delayed Engagement
Dual-Clutch Transmission (DCT) Shudder/Hesitation
6-Speed DCT Premature Clutch Failure
Dual Clutch Transmission (DCT) Shudder and Failure
IVT/CVT Transmission Failure and Power Loss
Concentric Slave Cylinder Failure (Manual Transmission)
IVT/CVT Transmission Failure and Shudder
8-Speed DCT Overheating Under Load / Towing
6-Speed DCT Harsh Shifting, Shuddering, and Hesitation
IVT (CVT) Judder and Hesitation
Smartstream IVT/CVT Hesitation, Judder, and Limp-Mode from Transmission Control Logic or Internal Faults
ZF 8HP Transmission Valve Body Malfunction
Automatic Transmission Valve Body Wear
ZF 8HP Mechatronic Unit Failure
ZF 8HP Harsh Shifting and Hesitation
9-Speed Automatic Transmission Harsh Shifting
ZF 8HP Valve Body Wear
Jatco CVT Transmission Overheating / Failure
9-Speed Automatic Transmission Rough Shifting
Jatco CVT Transmission Failure / Overheating
Transmission Overheating / Control Module Failure
Manual Transmission Clutch Issues (JL)
Manual Transmission Clutch Overheating / Fire Risk
Automatic Transmission Stalling / Auto-Park Engagement
ZF 8-speed (8HP) harsh shifting / delayed engagement (software/adaptation issues)
Dual-Clutch Transmission Judder (Hybrid)
CVT Shudder and Hesitation Under Acceleration
8-Speed DCT Harsh Shifting and Delayed Response
7-Speed DCT Transmission Clutch Judder
DCT Transmission Oil Pump Failure (2.5T)
8-Speed DCT Electric Oil Pump Failure
CVT Hesitation and Jerking Under Load
6-Speed Automatic Transmission Hesitation and Hard Downshift
CVT/IVT Hesitation, Jerking, and Delayed Engagement at Low Speed
CVT Transmission Failure/Shudder
CVT Transmission Failure
CVT Transmission Failure/Shudder
CVT Transmission Failure (Jatco CVT7/JF015E)
CVT Transmission Failure (Jatco CVT7/JF015E)
CVT Transmission Failure (Jatco CVT8/JF016E)
CVT Transmission Failure and Shudder
CVT Transmission Shudder and Failure (Jatco CVT8)
GR6 Dual-Clutch Transmission Judder and Failure
CVT Transmission Failure (Jatco CVT7)
Manual Transmission Synchro Wear (2nd/3rd)
CVT Transmission Failure Under Load
CVT Overheating During Highway Driving
Excessive Engine Noise and Vibration (HR16DE)
CVT Low-Speed Judder and Acceleration Hesitation
9-Speed Automatic Harsh Shifting, Shift Shock, and Delayed Engagement
CVT Transmission Shudder and Premature Failure
CVT Transmission Shudder and Premature Failure
CVT Transmission Shudder/Hesitation
CVT Transmission Hesitation and Harsh Engagement
CVT Chain Stretch and Transmission Judder
CVT Transmission Failure
Throw-Out Bearing Chirp/Failure
Throwout Bearing Noise and Premature Failure
CVT Transmission Failure and Harsh Engagement
CVT Valve Body Failure and Transmission Warning
CVT Chain Slip and Whining Under Load
Transmission Hesitation and Lurching at Low Speeds
Manual Transmission Grinding/Notchy Shifts
CVT Transmission Shudder and Failure
CVT Transmission Hesitation and Rubber Band Effect
ZF 8HP Transmission Rough Low-Speed Shifts
8-Speed Transmission Hesitation/Jerking
Manual Transmission Throw-Out Bearing Noise
iMT Rev-Match System Interference and Shift Feel
CVT Hesitation and Delayed Acceleration Response
DSG (DQ250/DQ381) Mechatronic Unit and Clutch Pack Failure
DSG Dual-Clutch Transmission Mechatronic Unit Failure
DSG Transmission Shudder and Rough Shifting
DSG Mechatronic Unit Failure
DSG (DQ250) Transmission Failure and Mechatronic Unit Issues
7-Speed DSG (DQ381) Shudder and Rough Low-Speed Shifting
Automatic Transmission Premature Failure
DSG Mechatronic Unit Failure
Automatic Transmission Valve Body Issues
FAQ
What does P0730 mean?
P0730 stands for "Incorrect Gear Ratio." The transmission is not achieving the expected gear ratio. Usually indicates internal transmission problems like worn clutch packs or bands.
What are the most common causes of P0730?
The most common causes of P0730 are: Worn clutch packs, Low transmission fluid, Failed shift solenoid, Internal transmission wear, Torque converter issue. The specific cause varies by vehicle.
How much does it cost to fix P0730?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0730?
Au7o has documented P0730 across 127 vehicle models from 25 manufacturers: Acura, Alfa Romeo, Audi, BMW, Chevrolet, Chrysler, Dodge, Fiat, Ford, Honda, Hyundai, Jaguar, Jeep, Kia, Land Rover, MINI, Mazda, Mercedes-Benz, Nissan, Porsche, Renault, Subaru, Toyota, Volkswagen, Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.