Parts for your 2005 Toyota Echo|yaris-Temperature sensors

2005 Toyota Echo/Yaris temperature sensors — what they do and how to look after them

Technical sources confirm the 2005 Toyota Echo/Yaris (XP10 with the 1NZ‑FE engine) uses multiple temperature sensors. These include the engine coolant temperature (ECT) sensor used by the engine control module, an intake air temperature (IAT) sensor built into the mass air flow (MAF) meter, and an automatic transmission fluid (ATF) temperature sensor on U340E automatic models. References: Toyota Repair Manual (TIS) for 1NZ‑FE Engine Control System—ECT Sensor