P0733 on Nissan: How to Diagnose & Fix
Gear 4 Incorrect Ratio
1 Nissan model · 1 documented issue · 1 critical · $250-$6,500 repair
P0733 on Nissan by model: symptoms, diagnosis and fix
Multiple 2020-2024 Titan owners report rough 2-3 or 3-4 shifts, delayed engagement when selecting Drive or Reverse, shuddering under light throttle, and occasional reduced-power or fail-safe operation. Nissan issued technical service information for transmission control module and valve body related drivability concerns on trucks using the 9-speed automatic. Owners commonly describe the problem as intermittent at first, then more frequent as mileage accumulates or after towing and hot-weather use.
Common Symptoms
- harsh upshifts
- hesitation when accelerating from a stop
- delayed engagement into Drive or Reverse
- shudder during light throttle cruising
- transmission stuck in fail-safe mode
- check engine light or transmission warning
How to Fix
Diagnosis typically starts with scanning the TCM/ECM for stored transmission and ratio codes, checking fluid condition and level, and confirming whether updated TCM calibration applies. Depending on findings, repairs range from software reprogramming and adaptive relearn to valve body replacement or, in more severe cases, transmission replacement. A road test with live data is important because many complaints involve intermittent flare or delayed engagement that may not appear cold.
Owner tips & cautions
- TipHave the dealer verify the latest TCM calibration and perform adaptive relearn before authorizing hard parts replacement.
- TipIf towing, owners recommend documenting fluid temperature and symptoms because heat-related complaints are easier to reproduce on a loaded road test.
P0733 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 P0733 mean on a Nissan?
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 Nissan it is documented across 1 model: Titan.
What are the most common causes of P0733?
The most common causes of P0733 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P0733 on a Nissan?
Published repair estimates on Nissan range from $250 to $6,500 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.
Looking for P0733 on a different make?
View P0733 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.