P17F0 on Infiniti: How to Diagnose & Fix
Transmission Mechanical Failure
2 Infiniti models · 2 documented issues · 2 critical · $200-$8,000 repair
P17F0 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
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (3)
The Jatco CVT in the QX60 is prone to premature failure, particularly in the 2013-2017 models. The transmission overheats during towing or sustained highway driving, leading to shuddering, slipping, and eventual complete failure.
Common Symptoms
- Transmission shuddering at highway speeds
- Loss of power during acceleration
- Whining noise from transmission
- CVT overheating warning
How to Fix
Replace CVT fluid every 30,000 miles instead of the recommended 60,000. Add an auxiliary transmission cooler for towing. Nissan extended the CVT warranty to 84 months/84,000 miles on affected models.
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 2014-2020 QX60 model-year/transmission specification, sealed container, current SKU, pack/order quantity an
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (4)
- CarComplaints: Nissan Pathfinder and Infiniti QX60 Transmission Lawsuit Almost Settledother
- InfinitiQX60.org: CVT Settlementforum
- Top Class Actions: Nissan, Infiniti Transmission Defect Class Action Settlementmedia
- ClassAction.org: Nissan Hit with Class Action Over Alleged Transmission Defect (2019-2021 Pathfinder, Infiniti QX60)media
P17F0 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 P17F0 mean on a Infiniti?
P17F0 stands for "Transmission Mechanical Failure." This manufacturer-specific code (notably on Nissan/Infiniti CVT transmissions, where it is associated with 'judder') indicates the transmission control system detected a mechanical failure or abnormal internal behavior inside the transmission. On CVTs it typically reflects belt/pulley slippage or wear producing a shudder or vibration; the control module flags it as an internal mechanical fault. When the system detects this condition, P17F0 sets, often with noticeable shaking under acceleration or a hesitation that feels like a slipping transmission. It generally signals significant internal wear that needs professional diagnosis. On Infiniti it is documented across 2 models: QX55, QX60.
What are the most common causes of P17F0?
The most common causes of P17F0 are: Worn or slipping CVT belt and pulleys, Degraded or contaminated transmission fluid, Low transmission fluid level, Internal pressure control problem (valve body/solenoid), Failing transmission fluid pump, Control software needing a reflash/recalibration, Excessive internal wear from age or overheating, Faulty transmission control module (rare). The specific cause varies by vehicle.
How much does it cost to fix P17F0 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 P17F0 on a different make?
View P17F0 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.