Parts for your 2015 Subaru Exiga-Temperature sensors

2015 Subaru Exiga temperature-sensors — purpose, upkeep, and when to replace

Temperature-sensors are absolutely fitted to the 2015 Subaru Exiga. Subaru’s Factory Service Manual (FSM) for Exiga models and Subaru diagnostic documentation list several temperature inputs as critical for engine and transmission control. The Engine Coolant Temperature (ECT) sensor is a primary ECM input (DTCs P0117/P0118 are cited in Subaru diagnostic charts), the intake air temperature (IAT) sensor is integrated with the airflow meter on many trims, the Lineartronic CVT uses a fluid temperature sensor within the valve body harness for shift and protection logic, and the HVAC system uses an ambient sensor for climate control. Subaru parts catalogues and FSM wiring diagrams for YA-series Exiga confirm these sensors across EJ- and FB-series engines and CVT drivetrains.

On a 2015 Subaru Exiga, temperature-sensors let the car’s computers keep everything sweet as. The ECT sensor helps the ECU sort cold starts, fuel mix, idle speed and radiator fan timing. The IAT sensor fine-tunes fuelling as the air coming in heats up or cools down. The CVT fluid temp sensor protects the transmission, altering line pressure and ratio behaviour when things get hot. The climate control’s ambient sensor helps the A/C hold the cabin right where it’s set, from the Coromandel to the Kimberley.

• Common temperature-sensors on Exiga models: engine coolant (ECT), intake air (IAT), CVT fluid temperature, ambient air for HVAC, and in some variants, engine oil temperature.

There’s no routine replacement interval for these sensors, they’re serviced as-needed. Still, a bit of TLC during regular servicing of your 2015-subaru-exiga helps avoid dramas.

• Scan data check: After an overnight cold soak, ECT and IAT should read close to ambient. If one’s miles off, it’s suspect.
• Cooling system care: Use the correct Subaru long-life coolant and bleed properly after any cooling work—air pockets can mislead the ECT and trigger fans or codes.
• Connectors and grounds: Inspect for green crust, oil ingress or broken tabs. Clean terminals and ensure good earths, many “sensor faults” are wiring-related.
• Replacement tips: Replace only with quality OEM-equivalent parts. Expect a small coolant loss when swapping an ECT, work on a cold engine, fit a new sealing washer/O-ring if specified, and tighten to the FSM torque spec.
• Watch for symptoms: Hard cold starts, high idle, poor fuel economy, radiator fans stuck on, CVT limp behaviour, or erratic A/C can all point to temperature-sensor issues.

With correct diagnostics and the right parts, temperature-sensor fixes on a 2015 Subaru Exiga are straightforward and keep the boxer and CVT happy for the long haul.

Popular questions about 2015 Subaru Exiga temperature-sensors

Where is the engine coolant temperature sensor on a 2015 Subaru Exiga?
On EJ-series engines it’s typically threaded into the coolant crossover or a coolant passage near the intake side, on FB-series engines it’s positioned on a cylinder head coolant gallery. Exact spot varies by engine code, so checking the FSM diagram for your VIN is the quickest way to pinpoint it.

Can a bad temperature sensor cause the radiator fans to run constantly?
Yes. If the ECT reading is implausible, the ECU can default to running the fans to protect the engine. You might also see rich running, rough cold starts or a check engine light with ECT-related codes.

Do temperature-sensors need routine replacement?
Not usually. They’re replaced when faulty. A quick scan check during servicing—comparing ECT and IAT to ambient on a cold engine—is a simple way to verify they’re healthy.