Parts for your 2016 Subaru Exiga-Temperature sensors

2016 Subaru Exiga temperature sensors — what they do and how to look after them

Yes, the 2016 Subaru Exiga is fitted with multiple temperature sensors. Factory technical sources confirm their presence and role: the Subaru Service Manual (STIS) for the FB-series engine details the Engine Coolant Temperature (ECT) sensor and Intake Air Temperature (IAT) function within the engine control system, Subaru wiring diagrams show ambient air and A/C evaporator temperature sensors for HVAC control, and the CVT section notes transmission fluid temperature monitoring. Typical OBD-II diagnostics for this model list temperature-related DTCs such as P0115 (ECT circuit) and P0128 (coolant thermostat/temperature), and the Subaru parts catalog lists the relevant sensors for the Exiga/Crossover 7.

On the Exiga, temperature sensors are the quiet achievers that keep everything sweet under the bonnet. The ECT sensor tells the engine computer how hot the coolant is so it can set fuelling and ignition, manage cold starts, and trigger the radiator fans. The IAT (often integrated in the MAF housing) helps trim fuelling based on air density. The ambient sensor feeds the climate control and dash readout, while the A/C evaporator sensor prevents the system from freezing. In CVT models, transmission fluid temperature is monitored to protect the gearbox and adjust shift strategy.

There’s no scheduled replacement for these sensors, they’re replaced on condition. Good servicing habits go a long way:

• Keep coolant fresh per the Subaru schedule and use the correct long-life coolant to protect the ECT sensor and reduce corrosion.
• Inspect connectors for corrosion or broken retainers, especially after front-end repairs or off-road splashes.
• Clean the MAF/IAT with proper MAF cleaner only—never touch the element.

Common signs of a dodgy temperature sensor include hard cold starts, high fuel use, radiator fans running constantly, erratic A/C, CVT going into a protective mode, or a Check Engine Light. A quick scan of live data will usually confirm which sensor is out of whack.

Replacement is straightforward for a trained tech. The ECT sensor typically needs a partial coolant drain, a new sealing washer or O-ring, correct torque, and a bleed to remove air. Ambient and A/C sensors live near the grille or HVAC case and can be replaced without disturbing fluids. Always clear codes and verify readings at full warm-up—around 90–100°C coolant temp is typical—and make sure the fans cycle as expected.

Popular questions about 2016 Subaru Exiga temperature sensors

How do I know if my Exiga’s coolant temperature sensor is failing?
Look for hard cold starts, uneven idle, heavy fuel consumption, fans that run all the time, or a Check Engine Light. A scan tool will show coolant temperature that’s implausible (stuck cold or hot) compared with reality. If the gauge is odd and the radiator hoses feel wrong for the indicated temp, the ECT sensor or its wiring could be the culprit.

Do temperature sensors need routine replacement?
No. Subaru doesn’t set a kilometre-based interval. They’re replaced when testing shows a fault. Prevent issues by keeping the correct coolant in service, ensuring clean electrical connectors, and avoiding harsh chemicals on the MAF/IAT.

Is it safe to drive with a faulty temperature sensor?
It’s not ideal. The ECU may run a fail-safe strategy—rich mixture, high idle, and radiator fans on—which can mask or worsen real overheating. The CVT may also derate to protect itself. Best bet: scan, diagnose, and sort it before a longer trip.