8945460010 Toyota SENSOR, FUEL TEMPERATURE, Price: 32.59$, Weight: 0.029kg

Precision Fuel Temp Sender for EFI Systems ⛽

This small thermistor-based unit tells the ECU the exact temperature of the fuel. With that info, the computer corrects injection timing, quantity, and vapor control. You get smooth starts, stable idle, cleaner emissions, and better economy. It’s critical on both gasoline and common-rail diesel engines, where fuel density and viscosity change with heat.

Why this part is needed

Accurate fuel temp data keeps mixtures right in hot traffic, cold mornings, and after heat soak. It protects the high-pressure pump, prevents vapor lock, and helps avoid over-fueling. Ideal when chasing rough idle, hard starting, or rising consumption.

How it works

Inside is an NTC thermistor sealed in a brass probe. As fuel warms, resistance drops. The ECU reads a reference voltage and converts it to temperature, then fine-tunes injection and purge strategy. Typical output spans about 0.2–4.8 V across the temp range.

What happens if it’s broken ⚠️

Expect long cranking, flat spots, poor hot restarts, black smoke on diesels, limp mode, and a check engine light. Codes like P0180–P0183 may appear. The pump can run hotter, and fuel trim will drift, wasting fuel.

Fitment & install tips ✅

Usually located on the rail, pump body, or filter head. Depressurize the system, disconnect battery, release the clip, swap the O-ring, and torque to spec. Keep the tip clean, use a light oil on the seal, and perform an ECU relearn if needed.