Parts for your 2007 Holden Commodore-Temperature sensors

2007 Holden Commodore temperature-sensors

Temperature sensors absolutely are used on the 2007 Holden Commodore. Factory documentation such as the Holden VE Commodore Service Manual (2006–2010), GM Global Service Information (GSI) for the Alloytec V6 and Gen IV V8, and well-known workshop guides (Ellery’s VE Series manual and Gregory’s publications) all specify several temperature-related sensors. These include the engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor, ambient air temperature sensor for HVAC and the instrument cluster, and the automatic transmission fluid temperature sensor. They’re fundamental to engine management, cooling control, shift strategy and climate performance, so the part is relevant and fitted to this model.

On a 2007 VE Commodore, the ECT sensor is the headline act. It tells the engine computer how hot the coolant is so it can sort fuel mixture, ignition timing, idle speed and radiator fan operation. When the ECT reads true, cold starts are tidy, warm-up is smooth and the fans only kick in when they should. The IAT helps the ECU fine-tune fuelling as outside temps change, while the ambient sensor feeds the dash temp readout and helps the climate control decide how hard to work. Autos also watch transmission fluid temp to protect the box and pick the right shift feel.

Typical hints that a temperature sensor or its wiring is having a moment include:

• Hard cold starts, rough idle or sluggish performance
• Fans running constantly or not cutting in when hot
• Erratic gauge readings or a Check Engine Light (codes like P0115–P0119)
• Poor fuel economy and a whiff of richness

There’s no fixed service interval for the ECT or other temp sensors, but they live a tough life. As part of routine servicing, it’s smart to scan for codes, visually check the plugs and harness for brittle insulation or green corrosion, and keep the cooling system in top nick with the correct Dex‑Cool-type coolant. Clean, correct coolant helps sensors live longer.

Replacement of an ECT sensor is straightforward for a competent home mechanic, but patience pays. Always let the engine cool, relieve any system pressure, and be ready to catch a small coolant loss. Unplug the connector, swap the sensor, use any supplied seal or O‑ring, tighten to the workshop manual spec and then refill/bleed the cooling system to avoid air pockets. A quick scan-tool check of live coolant temp against actual engine warmth is a handy final verification.

Many owners find these sensors last well past 150,000 km, but if the gauge is playing up or the fans act oddly, testing and replacing a tired sensor can bring the Commodore back to its easygoing best.

Popular questions about 2007 Holden Commodore temperature-sensors

Where is the coolant temperature sensor located?
The ECT sensor on VE-series Commodores is typically mounted in the coolant outlet/thermostat housing area on the Alloytec V6, and in a coolant passage on the V8. It sits where it can “see” circulating coolant, with a two-pin electrical connector. Access varies by engine, removing covers and intake ducting can help.

What’s the quickest way to tell if the ECT sensor is dodgy?
A scan tool reading that shows an implausible coolant temperature (for example, showing sub-zero on a fully warm engine) is a giveaway. Owners may also notice fans running when the engine is cold, hard cold starts, or a Check Engine Light. Rule out wiring and connector corrosion before condemning the sensor.

Do the cooling system and heater need bleeding after sensor replacement?
Yes, any time the cooling system is opened there’s a chance of trapped air. After replacing the sensor, refill with the correct coolant mix and bleed per the workshop procedure. Watch for steady heater output and stable temperature readings on a test drive to confirm the job’s right.