P0733 on Kia
Gear 4 Incorrect Ratio
P0733 on Kia vehicles indicates gear 4 incorrect ratio. Au7o has documented this code across 1 Kia model — most commonly on Sportage. This code indicates the transmission control module found that the actual gear ratio in 4th gear is outside the acceptable range for that gear. It is detected by comparing transmission input speed against output speed while 4th gear is engaged. A mismatch typically signals the transmission is slipping in 4th gear or that a control/hydraulic fault is preventing proper engagement. Typical repair costs on Kia range from $400 to $1,800, depending on the specific model and root cause.
Common Causes of P0733
- •Low or contaminated transmission fluid
- •Worn 4th-gear clutch packs or bands
- •Failing shift solenoid for 4th gear
- •Valve body or line pressure issues
- •Internal transmission mechanical wear
- •Restricted transmission filter
- •Faulty input or output speed sensor
P0733 on Kia by Model
Kia Sportage(1 issue)
- 6-Speed Automatic (A6MF) Harsh Shifting and Valve Body Wear2017-2022
The A6MF-family 6-speed automatic can develop harsh or erratic shifting, hard 6-to-4 kickdown 'bang,' shift flares, brief neutral feel during up/downshifts, and torque-converter clutch (TCC) shudder. The root cause is wear of the reducing-valve bores in the valve body, which lets line pressure drift out of spec; neglected fluid (SP4-spec) accelerates the wear. A documented secondary fault is a valve-body bolt that can abrade the internal wiring harness, producing intermittent solenoid faults. This is a distinct transmission failure mode from the AWD rear-differential coupling noise already documented.
Looking for P0733 on a different make?
View P0733 across all makes →Frequently Asked Questions
What does P0733 mean on Kia?▼
P0733 stands for "Gear 4 Incorrect Ratio." This code indicates the transmission control module found that the actual gear ratio in 4th gear is outside the acceptable range for that gear. It is detected by comparing transmission input speed against output speed while 4th gear is engaged. A mismatch typically signals the transmission is slipping in 4th gear or that a control/hydraulic fault is preventing proper engagement. On Kia specifically, this code is documented across 1 model.
What causes P0733 on Kia vehicles?▼
Common causes on Kia: Low or contaminated transmission fluid, Worn 4th-gear clutch packs or bands, Failing shift solenoid for 4th gear, Valve body or line pressure issues, Internal transmission mechanical wear. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0733 on a Kia?▼
Repair costs on Kia range from $400 to $1,800, depending on the specific model and root cause.
Which Kia models have P0733 documented?▼
Au7o has documented P0733 on 1 Kia model: Sportage.