Parts for your 2017 Nissan Pathfinder-Tx valve

2017 Nissan Pathfinder TX Valve: What it does and how to look after it

Technical sources confirm the 2017 Nissan Pathfinder (R52) uses a thermostatic expansion valve (TXV). The Nissan Service Manual for 2017 Pathfinder (HA: Heating & Air Conditioning) specifies an expansion valve at the evaporator inlet, and the Nissan Electronic Parts Catalogue lists Valve Assy–Expansion (commonly referenced as 92200-3TA0A/92200-3TA1A) for this model. Major aftermarket catalogues (DENSO, UAC, Four Seasons) also list an A/C expansion valve for the 2017 Pathfinder. So, yes—this vehicle is fitted with a TX valve and it’s relevant to A/C performance.

On the 2017 Pathfinder, the TX valve meters refrigerant into the evaporator, reacting to temperature and pressure so the air-con cools efficiently without freezing up. It balances superheat, helping the system deliver steady, crisp cabin temps whether it’s idling in city traffic or cruising up the coast.

When servicing, the TX valve is worth a look any time the A/C shows odd behaviour. Telltales include weak cooling at idle, intermittent cold air, evaporator frosting, or pressure readings that don’t stack up (very low suction with normal/high head, or hunting pressures). Because the TXV sits at the evaporator inlet near the firewall, it’s accessible but still a precision part—contamination or moisture can make it stick or clog.

If replacement is on the cards, a licensed air-con technician should recover the refrigerant, remove the lines at the valve, fit new O-rings lubricated with the correct oil, and install the new valve to the manufacturer’s procedure. It’s best practice to replace the receiver/drier (often integrated with the condenser on late-model Nissans) whenever the system is opened, then vacuum, leak-test, and recharge by weight with the refrigerant specified on the under‑bonnet label. Don’t guess the charge—Pathfinders are sensitive to over- or underfill.

For preventative care: change the cabin filter regularly, keep the condenser clean, and run the A/C often to circulate oil. If the system’s been contaminated (compressor failure, moisture ingress), insist on a thorough flush before fitting a new TX valve. Using the right PAG oil type and quantity matters, as does sticking to Nissan’s torque specs during reassembly. Done properly, the TX valve will keep the Pathfinder’s climate control performing sweet as through Aussie and Kiwi summers.

• Common symptoms of TXV issues: weak cooling, fluctuating vent temps, frosting, unusual pressure readings.
• Best practice: replace O-rings, evacuate thoroughly, recharge by weight, and verify operation with proper gauges.

Popular questions about 2017 Nissan Pathfinder TX valve

Does the 2017 Pathfinder use a TX valve or an orifice tube?
It uses a thermostatic expansion valve at the evaporator inlet. This is documented in the 2017 Pathfinder Service Manual (HA section) and reflected in Nissan’s parts catalogue listings.

What are the signs a TX valve is failing on this model?
Expect weak or intermittent cooling, evaporator icing, hissing at the firewall, and suction pressures that are unusually low while head pressure stays normal or fluctuates. A pro should confirm with gauge readings and temperature checks.

Do I need to regas after replacing the TX valve, and what refrigerant does it use?
Yes—after any open repair the system must be evacuated and recharged by weight. Use only the refrigerant specified on the vehicle’s label under the bonnet, don’t mix types. An ARCtick‑licensed tech is recommended for the job.