Parts for your 2006 Toyota Camry-Temperature sensors

2006 Toyota Camry temperature-sensors: what they do and how to look after them

Temperature-sensors are absolutely used on the 2006 Toyota Camry. Technical references such as the Toyota Camry 2006 Repair Manual (Engine Control System), the Toyota Electrical Wiring Diagram (EWD), and OBD-II/SAE J1979 standards all detail the Engine Coolant Temperature (ECT) sensor and related temperature inputs (Intake Air Temperature, transmission fluid temperature, and ambient/evaporator sensors on models with auto A/C). These are core signals for the ECU and HVAC systems, so they’re very much relevant on this model.

On the 2006 Camry (2AZ-FE four-cylinder and V6 variants), the ECT sensor is the star player. It tells the engine computer how hot the coolant is so it can set cold-start enrichment, ignition timing, idle speed, and when to bring the radiator fans on. It also influences automatic transmission shift behaviour and the dash temperature gauge. Other temperature-sensors help fine-tune fuelling (IAT), protect the auto trans, and keep cabin climate control behaving nicely.

There’s no fixed replacement interval for these sensors, they’re usually replaced on condition. A healthy Camry will show stable temperature readings, sensible fan operation, tidy fuel economy, and no temperature-related fault codes. When an ECT sensor or its wiring goes crook, common signs include hard cold starts, over-fuelling, erratic gauge readings, cooling fans running constantly or not at all, and DTCs like P0115–P0119, P0125 or P0128.

• Visual checks during servicing: Look for brittle wiring, green corrosion in the two-pin connector, or coolant stains around the sensor boss.
• Basic testing: With the engine stone cold, scan-tool ECT should read close to ambient. As the engine warms, readings should rise smoothly.
• Replacement tips: Work on a cool engine, relieve system pressure, and catch coolant neatly. The ECT sits near the thermostat/water outlet under the bonnet, swap the sensor with a new sealing washer/O-ring as specified, torque to workshop spec, reconnect the plug, then top up and bleed the cooling system.
• Coolant care matters: Use the Toyota-approved coolant type and keep change intervals up to date. Contaminated coolant can shorten sensor life.

Kept clean, dry, and connected to good wiring, temperature-sensors tend to last many years. If faults pop up, a quality replacement and proper bleeding usually restores smooth running and fan control without drama.

Popular questions about 2006 Toyota Camry temperature-sensors

Where is the engine coolant temperature (ECT) sensor located?
On most 2006 Camry engines it’s threaded into the water outlet/thermostat housing at the end of the upper radiator hose on the engine side. Look for a small two-pin connector. Access is from the top with the bonnet open.

What fault codes point to a dodgy temperature-sensor?
Typical ECT-related codes are P0115, P0116, P0117, P0118 and P0119. You might also see P0125 or P0128 if the ECU reckons the engine isn’t reaching or holding proper operating temperature. For IAT or A/C sensors, expect codes in their respective ranges.

Do I need to bleed the cooling system after replacing the ECT sensor?
Yes. Any time the cooling circuit is opened, bleed the system to remove air pockets. Refill with the correct Toyota coolant, run the engine with the heater on, and top up as the level drops. Recheck after a short drive once it’s cooled.