P0746 on Toyota: How to Diagnose & Fix
Pressure Control Solenoid Performance/Stuck Off
1 Toyota model · 1 documented issue
P0746 on Toyota by model: symptoms, diagnosis and fix
Owners of the 300-series Land Cruiser and closely related TNGA-F Toyota/Lexus models have reported delayed engagement, low-speed hesitation, or abrupt 10-speed automatic shifts, especially when cold or during rolling stops. Toyota service literature for related powertrain calibration concerns points to software logic rather than hard-part failure in many cases. Complaints typically describe inconsistent throttle response paired with a sudden downshift or lurch.
Common Symptoms
- Delayed drive engagement
- Harsh 1-2 or 2-1 shift
- Lurch when reapplying throttle
- Hesitation from a rolling stop
- Inconsistent shift timing when cold
How to Fix
Scan for transmission and engine codes, confirm fluid condition, and road-test under the same low-speed conditions that trigger the complaint. Dealers typically check for updated ECM/TCM calibration files and perform a software reflash/adaptive reset before considering valve body or internal transmission work. If symptoms persist after calibration, line pressure and shift solenoid operation should be evaluated.
Sources for this issue (1)
P0746 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 P0746 mean on a Toyota?
P0746 stands for "Pressure Control Solenoid Performance/Stuck Off." P0746 means the transmission's pressure control solenoid 'A' is performing poorly or appears stuck in the off (low pressure) position. This solenoid regulates hydraulic line pressure that applies clutches and bands to make smooth, firm shifts; the TCM detects when commanded pressure changes aren't producing the expected response. A stuck-off condition typically means line pressure stays low. You may experience slipping, soft or delayed shifts, harsh engagement, overheating, or the transmission entering limp mode. On Toyota it is documented across 1 model: Land Cruiser.
What are the most common causes of P0746?
The most common causes of P0746 are: Low, dirty, or degraded transmission fluid, Faulty pressure control / EPC solenoid, Clogged valve body passages or stuck valve, Wiring or connector fault at the solenoid, Internal transmission wear (worn clutches, leaking seals), Dirty or clogged transmission filter, Faulty transmission control module (less common). The specific cause varies by vehicle.
How much does it cost to fix P0746 on a Toyota?
Repair costs vary widely with the root cause and Toyota model; each issue on this page carries its own estimate where one is published.
Looking for P0746 on a different make?
View P0746 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.