Parts for your 2015 Holden Captiva 5-Temperature sensors

2015 Holden Captiva 5 temperature-sensors

Yes, temperature sensors are absolutely fitted and relevant on the 2015 Holden Captiva 5. This is supported by GM Holden service information for the CG Captiva Series II (2011–2016), the Holden Electronic Parts Catalogue (EPC), and ACDelco/Delphi parts catalogues, which list and detail the Engine Coolant Temperature (ECT) sensor, Intake Air Temperature (IAT) sensor, ambient air temperature sensor for HVAC/cluster, transmission fluid temperature sensing within the 6-speed auto, and—on diesel variants—exhaust gas temperature (EGT) sensors for emissions control.

On this Captiva 5, the temperature sensors are the quiet achievers that keep the engine, gearbox, and climate control behaving. The ECT sensor feeds the ECU live coolant temperature so it can manage cold-start fuelling, timing, idle speed, and switch the radiator fans. The IAT helps the ECU trim fuelling as air density changes. The ambient sensor informs the dash reading and helps the HVAC deliver proper cabin temps. Autos rely on transmission temperature to choose shift patterns and line pressure. Diesel versions also use EGT sensors to protect the turbo/DPF and manage regenerations.

They’re solid-state thermistors and generally maintenance-free, but they do appreciate a bit of attention during regular servicing. A quick scan-tool check when the engine is cold should show ECT, IAT, and ambient temps all reading close to outside temperature, anything way off points to a lazy sensor or wiring issue. Keep the cooling system healthy—fresh, correct Dex-Cool type coolant and a bleed after any cooling work—so the ECT sensor isn’t bathing in sludge. If replacing an ECT sensor, work on a cold engine, catch and refill coolant, fit a new seal, avoid thread tape if it uses an O-ring, and tighten to the manufacturer’s spec. After refitting, clear any fault codes and verify fan operation and temperature readings.

Common signs of a crook temperature sensor or circuit include:

• Hard cold starts, rich running, or high idle
• Cooling fans stuck on or never coming on
• Poor A/C performance or wrong outside-temp reading
• Harsh/odd shifts in the auto when hot or cold
• Fault codes like P0117/P0118 (ECT) or P0113 (IAT)

There’s no fixed replacement interval—swap sensors when readings are implausible, faults are stored, or drivability points that way. Stick with quality OE-equivalent parts, inspect connectors for corrosion or broken tabs, and on diesel EGT sensors, avoid twisting the harness and use anti-seize only if specified in GM/Holden procedures.

Popular questions

Where is the engine coolant temperature sensor on a 2015 Captiva 5?
The ECT sensor is typically mounted in the coolant outlet/thermostat housing area on the cylinder head side of the 2.4‑litre petrol engine. It reads coolant temperature as it leaves the engine. Access is under the bonnet, remove intake ducting as needed and always work cold to avoid burns and coolant spray.

Do temperature sensors need coding after replacement?
For the ECT and IAT on the Captiva 5, no coding is normally required. Fit the new sensor, reconnect, top up and bleed coolant if applicable, then clear DTCs and check live data. Transmission and diesel EGT strategies are handled by the control modules, replacing those sensors usually doesn’t require programming, but some relearns or adaptations may be prompted by a scan tool.

What’s the best way to test if a sensor is faulty?
Use a scan tool on a cold engine: ECT, IAT, and ambient should all be within a few degrees of each other and outside air. Then run the engine and watch ECT climb smoothly, any wild spikes or fixed readings suggest a sensor or wiring fault. Compare the dash and HVAC performance with live data and check for stored fault codes.