Parts for your 2010 Toyota Aurion-Temperature sensors

2010 Toyota Aurion temperature sensors: what they do and how to look after them

Based on Toyota technical literature for the Aurion GSV40 series—including the Toyota Repair Manual, New Car Features (NCF) for the 2GR‑FE V6, the Electrical Wiring Diagram (EWD), and the U660E automatic transmission manual—temperaturesensors are absolutely relevant and fitted to the 2010 Toyota Aurion. The car uses several: an engine coolant temperature (ECT) sensor, an intake air temperature (IAT) sensor integrated in the MAF, an automatic transmission fluid temperature sensor, an ambient air temperature sensor for the HVAC, and an evaporator temperature sensor.

On a 2010 Aurion, temperaturesensors are the quiet achievers that keep the big 2GR‑FE V6 happy. The ECT sensor tells the engine computer how hot the coolant is so it can sort cold starts, fuel trims, ignition timing, and when to kick the thermo fans on. The IAT sensor inside the MAF helps fine‑tune fuelling as air density changes, while the transmission fluid temperature sensor in the U660E manages shift timing and line pressure to protect the box when it’s cold or working hard. Up front, the ambient and evaporator sensors help the climate control hold the temp you set without fogging or icing the evaporator.

They’re not typical “replace every X kilometres” items, but they do deserve a look during servicing. A quick scan with an OBD‑II tool to compare real‑time temperaturesensors readings to reality (cold start close to ambient, warm idle around thermostat spec) is an easy health check. Under the bonnet, inspect connectors for green crust, brittle wiring, or oil/coolant wicking. Make sure the cooling system is bled properly—air pockets can fool the ECT and confuse the fans and gauge.

If the ECT plays up you’ll often see hard cold starts, rich running, poor economy, or fans running flat out, sometimes with codes like P0115–P0119 or P0125. A/C temp issues can throw P0071–P0073 or HVAC B‑codes, and odd shifting under load can be a hint at ATF temp sensor trouble (e.g., P0710‑series). The IAT/MAF combo loves a gentle clean with MAF‑safe cleaner—no poking the sensing wire. The ambient sensor sits behind the grille and can get whacked by road debris, if the outside temp reading is way off, check there first.

• When replacing an ECT sensor, only do it on a cool engine, catch and top up coolant as required, and torque to the factory spec with a new seal if specified.
• For the transmission temp sensor, follow the Toyota test chart first, it’s not a routine service item and may require pan access or deeper work.
• If the air‑con is misbehaving, verify ambient and evaporator sensor readings before blaming the compressor.

Keeping these temperaturesensors happy helps the Aurion run smoother, sip less petrol, shift smarter, and keep the cabin comfy on scorching Aussie or Kiwi days.

Popular question: Where is the engine coolant temperature sensor on a 2010 Toyota Aurion?

On the 2GR‑FE V6 it’s fitted at the water outlet/thermostat housing area at the front of the engine, near the radiator side. Access is from above once the engine cover is off, unplug the 2‑pin connector, and be ready to catch a bit of coolant if removing it.

Popular question: Is the Aurion’s intake air temperature sensor separate from the MAF?

No—on the 2010 Aurion the IAT is integrated into the MAF sensor in the intake duct just after the airbox. If IAT data looks odd, check the MAF, its wiring, and for any intake leaks downstream of the airbox.

Popular question: What fault codes point to bad temperaturesensors on a 2010 Aurion?

Common ones include P0115–P0119 and P0125 for ECT issues, P0071–P0073 for the ambient sensor, P0710–P0713 for transmission fluid temp, and HVAC B‑codes for the evaporator sensor. Always confirm with live data and a wiring check before replacing parts.