Parts for your 2007 Toyota Aurion-Temperature sensors

2007 Toyota Aurion temperature sensors — what they do and how to look after them

Temperature sensors are absolutely fitted to the 2007 Toyota Aurion (GSV40, 2GR‑FE V6). Toyota’s own technical literature — the Aurion Repair Manual (Engine Control [SFI] section), the Electrical Wiring Diagram (EWD) for GSV40, and the New Car Features guide for the GR engine — detail several temperature sensors used across the engine and drivetrain. Key ones include the engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor (built into the MAF), ambient temperature sensor for the A/C and cluster, an evaporator temp sensor, and an automatic transmission fluid (ATF) temperature sensor inside the U660E transaxle.

On this Aurion, the ECT sensor is the hero. It tells the engine ECU how hot the coolant is so it can fine‑tune fuel, ignition, idle speed, VVT‑i operation and when to kick the radiator fans in. The IAT helps trim fuelling as air density changes. The ambient and evaporator sensors keep the climate control honest, while the ATF temp sensor protects the transmission and guides shift behaviour.

If a temperature sensor plays up, the car can act a bit off. Watch for these:

• Hard cold starts, rich running, high idle or lousy fuel economy
• Thermo fans running all the time, or the temp gauge reading oddly
• A/C that’s not cooling right, or transmission going into protective shifting
• Check engine light with codes like P0115–P0118 (ECT) or P0711–P0713 (ATF temp)

There’s no fixed replacement interval for these sensors — they’re changed on condition. As part of servicing, it’s smart to scan the live data cold and hot to confirm the ECT and IAT read sensibly, inspect connectors for corrosion, and keep the cooling system healthy with the correct Toyota Super Long Life Coolant. A clean MAF helps the IAT read accurately, too.

Replacing the ECT is straightforward for most workshops: let it cool, relieve pressure, drain a little coolant, unplug and remove the sensor from the water outlet/thermostat housing, fit the new one with its seal, and torque to spec (around 20 N·m), then refill and bleed. Always use the right coolant and don’t mix types. The ATF temperature sensor lives inside the transmission as part of the internal harness — replacement means dropping the pan and working under the valve body, so that job’s best left to an experienced tech.

Look after the connectors, keep coolant fresh, and these sensors will usually go the distance across plenty of Kiwi and Aussie kilometres.

Popular questions

Where is the engine coolant temperature (ECT) sensor on a 2007 Aurion?
It’s mounted on the engine’s water outlet/thermostat housing at the front of the 2GR‑FE V6. Access is from the top — remove the engine cover and air intake ducting for room. You’ll see the small two‑pin sensor threaded into the housing near the upper radiator hose area.

Does the 2007 Aurion have a transmission temperature sensor?
Yes. The U660E six‑speed auto uses an ATF temperature sensor inside the transmission (part of the internal wiring/solenoid harness). The ECU uses it for shift control and protection. Faults can set codes like P0711 or cause harsh or protective shifting