P0776 on Infiniti: How to Diagnose & Fix
Pressure Control Solenoid B Performance/Stuck Off
1 Infiniti model · 1 documented issue · 1 critical · $200-$8,000 repair
P0776 on Infiniti by model: symptoms, diagnosis and fix
The QX55 pairs the torque-rich VC-Turbo engine with a Jatco Xtronic CVT. Owners and technicians report the classic Nissan/Infiniti CVT complaints: a rubber-band or 'revving' feel where engine RPM flares without corresponding acceleration, low-speed judder/shudder while slowing to a stop, hesitation and turbo lag off the line, and overheating under sustained load. CVTs are sensitive to the engine's low-end torque, and heat plus fluid breakdown accelerate internal wear. Judder trouble codes such as P17F0/P17F1 are associated with the family.
Common Symptoms
- Engine RPM flares without acceleration (rubber-band feel)
- Shudder/judder when slowing to a stop
- Hesitation or turbo lag from a stop
- Whining or droning noise
- Harsh or delayed engagement
- Overheating / limp mode under load
How to Fix
Start with a genuine Nissan NS-3 CVT fluid exchange and check for leaks or low fluid; heat is the primary enemy. A dealer scan for judder codes can call for a valve-body/pressure recalibration or valve-body replacement. Severe cases require a CVT rebuild or replacement. Frequent fluid checks and an auxiliary cooler help; avoid heavy towing.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Infiniti/Nissan NS-3 CVT fluidOEM999MP-CSHNS3 superseding 999MP-CV0NS3 / 999MP-NS300P
Confirm the exact QX55 model-year fluid specification, current container SKU, sealed product, order/pack quantity and measured refill amount.
- Genuine Infiniti QX55 CVT control-valve oil filterOEM31726-28X0A
Confirm VIN/current supersession for 2023-2025 before ordering.
- Genuine Infiniti QX55 CVT pan oil strainerOEM31728-28X0A
Confirm VIN/current supersession for 2023-2025 and separately order the exact pan gasket, drain washer and re
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Sources for this issue (3)
P0776 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 P0776 mean on a Infiniti?
P0776 stands for "Pressure Control Solenoid B Performance/Stuck Off." This code means the transmission's Pressure Control Solenoid B is not performing correctly and is behaving as if stuck in the 'off' position. Pressure control solenoids regulate the hydraulic fluid pressure used to apply clutches and bands and to control shift quality, so when one underperforms the transmission may shift harshly, slip, flare between gears, or feel inconsistent. The transmission control module sets this code when the fluid pressure or response it measures doesn't match what it commanded from that solenoid. It generally indicates a hydraulic performance issue with the solenoid or its fluid circuit rather than just a wiring fault. On Infiniti it is documented across 1 model: QX55.
What are the most common causes of P0776?
The most common causes of P0776 are: Stuck or failed pressure control solenoid B, Low, dirty, or degraded transmission fluid, Clogged solenoid screen or valve body passages, Sticking or worn valve body components, Wiring or connector problem at the solenoid, Internal transmission wear or pressure loss, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P0776 on a Infiniti?
Published repair estimates on Infiniti range from $200 to $8,000 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 P0776 on a different make?
View P0776 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.