Parts for your 2022 Toyota C-hr-Tx valve

2022 Toyota C‑HR TX Valve: what it does and how to look after it

Per Toyota’s factory Repair Manual and Electronic Parts Catalogue for the C‑HR (AU/NZ 2022 models, petrol and hybrid), the air‑conditioning system uses a “Cooler Expansion Valve” at the evaporator—commonly called a TX valve (TXV). DENSO service literature for the C‑HR HVAC module shows the same TXV layout. So yes, this model is fitted with a TX valve rather than an orifice tube.

The TX valve’s job is to meter refrigerant into the evaporator based on temperature and pressure, keeping superheat in the sweet spot. That means steadier cabin temps, less fogging, and happier hardware—especially the compressor. On AU/NZ‑spec cars running R‑1234yf (some markets may still use R‑134a), a healthy TXV helps the system cool quickly without icy evaporators or pressure spikes.

It’s not a routine replacement item, but it can wear or get jammed by debris or moisture. Common clues include:

• Erratic cabin cooling—cold one minute, warm the next
• Frost on the small (liquid) line at the firewall or hissing that comes and goes
• High side pressure too high/low side too low, or cycling that doesn’t match cabin demand

Keeping it happy is mostly about good A/C hygiene:

• Run the A/C regularly to circulate oil and keep the valve from sticking.
• Change the cabin filter on time so airflow across the evaporator stays strong.
• Keep the condenser clean and straight, poor heat rejection stresses the TXV and compressor.

If a TX valve needs replacing on a 2022 C‑HR, it’s a pro job. The system must be recovered, the evaporator/TXV joint accessed at the HVAC case, O‑rings replaced and lightly oiled, bolts torqued to Toyota spec, then evacuated and recharged by weight. Hybrids use an electric compressor and specific non‑conductive oil (ND‑OIL 12), the wrong oil can damage the unit. R‑1234yf requires dedicated equipment and careful handling. In AU/NZ, use an ARCtick‑licensed technician. After a compressor failure or if moisture/contamination is found, the TXV is often replaced along with the receiver‑drier and a thorough flush or component replacement as per the Toyota manual.

For parts, Toyota lists it as the Cooler Expansion Valve, confirm the exact part number against the VIN to match engine and HVAC variant.

Does the 2022 Toyota C‑HR use a TX valve or an orifice tube?

It uses a TX valve. Toyota’s Repair Manual and EPC for the 2022 C‑HR identify a “Cooler Expansion Valve” at the evaporator inlet. DENSO diagrams for the HVAC unit show the same TXV layout, not an orifice tube.

When should the TX valve be replaced on a 2022 C‑HR?

It isn’t a scheduled service item. Replace it if diagnosed faulty (sticking, blocked, or leaking), typically after pressure/temperature testing and confirming no other faults. It’s commonly renewed after a compressor failure or when contamination or moisture is present in the system.

What refrigerant and oil does the 2022 C‑HR use, and does that affect TX valve service?

Most AU/NZ cars use R‑1234yf, some markets may have R‑134a. Hybrids use a specific non‑conductive compressor oil (ND‑OIL 12). These choices determine the correct service equipment, charge weight, and oil—important for TXV performance and compressor longevity. Always follow Toyota’s specs on the under‑bonnet label and in the Repair Manual.