Parts for your 2017 Toyota Camry-Tx valve

2017 Toyota Camry TX Valve: What it does and when to service it

Based on Toyota’s factory service information (Toyota Camry 2015–2017 Repair Manual, TIS: Air Conditioning – Cooler Expansion Valve), the Toyota Electronic Parts Catalogue for ASV50/AVV50 series, and DENSO A/C component catalogues, the 2017 Toyota Camry is fitted with a thermal expansion valve (often called a TX valve or expansion valve). It’s mounted at the evaporator and is a core control component in the Camry’s air-con system.

The TX valve meters refrigerant into the evaporator, reacting to temperature and pressure so the evaporator runs at the sweet spot—cold enough to chill the cabin, but not so cold it ices up. By maintaining proper superheat, it protects the compressor from liquid slugging and helps deliver stable, efficient cooling on hot Aussie and Kiwi days, whether stuck in traffic or cruising down the motorway.

There’s no routine “maintenance” for a TX valve, but it should be checked during A/C servicing for leaks at the block and line connections. Tell-tale signs of a crook or contaminated TX valve include weak cooling, frosty or sweating lines near the firewall, rapid compressor cycling, inconsistent vent temps, or unusual hissing at the dash. Pressure gauge readings that show very low low-side or abnormally high high-side can also point to a restricted or stuck valve—though proper diagnosis is key, as these symptoms can overlap with a blocked cabin filter, failing condenser fan, low charge, or moisture in the system.

When replacement is warranted—commonly after compressor failure, desiccant breakdown, or confirmed internal restriction—best practice is to:

• Recover the refrigerant and depressurise the system.
• Access the valve at the evaporator housing (typically behind the glovebox area).
• Replace O-rings, lightly oil them with the correct PAG/ND oil, and torque fittings to spec.
• Evacuate to a deep vacuum to remove moisture, then recharge with the refrigerant type and weight shown on the under‑bonnet label.

Because refrigerant handling is regulated in Australia and New Zealand, any work beyond basic inspection should be done by a licensed automotive air-conditioning technician (ARCtick in Australia). Using the right refrigerant, oil type, and charge weight is crucial, the Camry’s label will confirm whether it runs R-134a or a later-spec refrigerant for your market.

To keep the whole system happy, replace the cabin filter regularly, make sure the condenser is free of debris, and run the air-con for a few minutes each week—even in winter—to circulate oil and keep seals supple.

Popular questions about 2017 Toyota Camry TX valves

Does the 2017 Camry use a TX valve or an orifice tube?
It uses a TX valve. Toyota’s service manual and EPC list a “cooler expansion valve” at the evaporator for ASV50/AVV50 models. There’s no orifice tube in this setup.

Where is the TX valve located on a 2017 Camry?
It’s mounted on the evaporator at the HVAC case, typically accessed from behind the glovebox. The refrigerant lines connect to it at the firewall/dash area.

Should the TX valve be replaced with the compressor?
It’s strongly recommended if the compressor failed or the system was contaminated. Replacing the TX valve (and receiver/drier) helps protect the new compressor and restores proper flow control.