P0730 on Land Rover
Incorrect Gear Ratio
P0730 on Land Rover vehicles indicates incorrect gear ratio. Au7o has documented this code across 2 Land Rover models — most commonly on Discovery Sport, Range Rover 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 Land Rover range from $2,000 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 Land Rover by Model
Land Rover Discovery Sport(1 issue)
- ZF 9HP48 9-Speed Transmission Harsh Shifting2015-2020
The ZF 9HP48 nine-speed automatic transmission in the Discovery Sport is notorious for harsh and clunky shifts, especially at low speeds and when cold. The transmission hunts between gears, delays shifts, and occasionally jolts during 1-2 and 2-3 upshifts. Some owners report the transmission going into limp mode. The complex 9-speed design was intended for fuel efficiency but the calibration from JLR has been problematic.
Land Rover Range Rover Sport(1 issue)
- ZF 8HP70 Transmission Valve Body and Mechatronic Issues2014-2022
The ZF 8HP70 eight-speed automatic transmission used in the L494 Range Rover Sport develops valve body and mechatronic unit faults. Symptoms include harsh shifts, delayed engagement, and occasional limp mode. The solenoids in the valve body wear and cause improper fluid routing. The transmission adapts by increasing line pressure, which accelerates wear on the clutch packs.
Looking for P0730 on a different make?
View P0730 across all makes →Frequently Asked Questions
What does P0730 mean on Land Rover?▼
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 Land Rover specifically, this code is documented across 2 models.
What causes P0730 on Land Rover vehicles?▼
Common causes on Land Rover: 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 Land Rover?▼
Repair costs on Land Rover range from $2,000 to $5,000, depending on the specific model and root cause.
Which Land Rover models have P0730 documented?▼
Au7o has documented P0730 on 2 Land Rover models: Discovery Sport, Range Rover Sport.