Parts for your 2016 Toyota Wish-Temperature sensors

2016 Toyota Wish temperature sensors — what they do and how to look after them

Temperature sensors are absolutely used on the 2016 Toyota Wish. Toyota’s own technical literature — including the New Car Features (ZGE2# series, 2009–2017), the Repair Manual (RM) and the Electrical Wiring Diagram (EWD), along with Techstream diagnostic data and OBD-II fault families (for example P0115–P0119 for Engine Coolant Temperature and P0111–P0113 for Intake Air Temperature) — confirms multiple temperature inputs across the powertrain and climate systems.

On a 2016 Wish with the 2ZR-FAE or 3ZR-FAE engine, temperature sensors help the ECU and other controllers make smart decisions. The Engine Coolant Temperature (ECT) sensor governs cold-start enrichment, ignition timing, radiator fan operation and thermostat strategies. The Intake Air Temperature (IAT) sensor trims fuelling as air density changes. The ambient and A/C evaporator temperature sensors keep cabin comfort steady and prevent evaporator icing. On CVT-equipped variants, a transmission fluid temperature sensor helps manage shift feel and protection when the fluid is cold or hot.

• Common sensors fitted: Engine Coolant Temp (ECT), Intake Air Temp (IAT), Ambient Temp, A/C Evaporator Temp, and CVT Fluid Temp (where applicable).

These solid-state sensors don’t have a routine replacement interval, but they do benefit from sensible care. During regular servicing, a workshop can quickly confirm they’re healthy by comparing live data (cold start should read close to outside temperature, warm readings typically stabilise around 85–95 °C for coolant). Keeping the correct Toyota Super Long Life Coolant (pink, pre-mixed) fresh helps the ECT sensor live a long life, as old coolant can encourage corrosion at the sensor tip. Always handle connectors gently and keep them clean and dry under the bonnet.

If the ECT or IAT fails or drifts out of range, expect hard cold starts, a rich smell, poor fuel economy, radiator fans running when they shouldn’t, odd gauge behaviour, or lacklustre A/C performance.

• Typical symptoms: increased fuel use, rough idle when cold, black soot at the tailpipe, fans cycling oddly, A/C cutting out, or a check engine light with codes such as P0115–P0119 (ECT) or P0111–P0113 (IAT).

Replacement is straightforward for a trained tech: let the engine cool, relieve system pressure, drain a little coolant, disconnect the plug, swap the sensor and sealing washer/O-ring, then refill and bleed the cooling system. The sensor should be tightened to the torque specified in the Toyota Repair Manual — over-tightening can crack housings. After refilling, a quick scan-tool check ensures readings make sense and that the radiator fans behave correctly. Sticking with genuine or OE-quality parts and the correct coolant mix is the safest bet for long-term reliability.

Popular questions

Where is the engine coolant temperature sensor located on a 2016 Toyota Wish?
On the ZR-series engines, the ECT sensor is typically threaded into the coolant outlet/thermostat housing or cylinder head, near the upper radiator hose connection. Access is usually from the top under the bonnet