P0729 on Nissan
Gear 6 Incorrect Ratio
P0729 on Nissan vehicles indicates gear 6 incorrect ratio. Au7o has documented this code across 1 Nissan model — most commonly on Pathfinder. P0729 means the transmission control system detected an incorrect gear ratio in 6th gear — the computer compares input shaft speed to output shaft speed and found the resulting ratio doesn't match what 6th gear should produce. This usually indicates the transmission is slipping in that gear, a clutch or band isn't holding, or a hydraulic/solenoid control problem is preventing proper engagement. You may feel slipping, flaring RPM, harsh shifts, or the transmission dropping into limp mode. Low fluid and worn internal components are frequent contributors.
Common Causes of P0729
- •Low or contaminated transmission fluid
- •Worn or slipping clutches/bands inside the transmission
- •Faulty shift solenoid or pressure control solenoid
- •Valve body wear or sticking valves
- •Failing torque converter
- •Internal mechanical wear or damage
- •Speed sensor fault giving incorrect ratio calculation
P0729 on Nissan by Model
Nissan Pathfinder(1 issue)
- 9-Speed Automatic Harsh Shifting, Shift Shock, and Delayed Engagement2022-2025
The redesigned 2022+ Pathfinder switched from the CVT to a ZF-based 9-speed automatic, and many owners reported harsh 1-2 or 2-3 shifts, lurching at low speed, hesitation when selecting Drive or Reverse, and occasional banging into gear. Nissan issued service information and software updates addressing shift quality and transmission control behavior, indicating this is a recognized field issue rather than isolated driver perception. Complaints commonly describe the problem as most noticeable when cold, in stop-and-go traffic, or during parking maneuvers.
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What does P0729 mean on Nissan?▼
P0729 stands for "Gear 6 Incorrect Ratio." P0729 means the transmission control system detected an incorrect gear ratio in 6th gear — the computer compares input shaft speed to output shaft speed and found the resulting ratio doesn't match what 6th gear should produce. This usually indicates the transmission is slipping in that gear, a clutch or band isn't holding, or a hydraulic/solenoid control problem is preventing proper engagement. You may feel slipping, flaring RPM, harsh shifts, or the transmission dropping into limp mode. Low fluid and worn internal components are frequent contributors. On Nissan specifically, this code is documented across 1 model.
What causes P0729 on Nissan vehicles?▼
Common causes on Nissan: Low or contaminated transmission fluid, Worn or slipping clutches/bands inside the transmission, Faulty shift solenoid or pressure control solenoid, Valve body wear or sticking valves, Failing torque converter. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0729 on a Nissan?▼
Repair costs vary widely depending on the root cause and specific Nissan model.
Which Nissan models have P0729 documented?▼
Au7o has documented P0729 on 1 Nissan model: Pathfinder.