Parts for your 2014 Mitsubishi Lancer-Temperature sensors

2014 Mitsubishi Lancer temperature sensors: what they do and how to look after them

Temperature sensors are absolutely fitted to the 2014 Mitsubishi Lancer and are central to how the car runs. Technical sources, including the Mitsubishi Motors Lancer factory service manual for the 2008–2017 range (engine control and cooling sections), the manufacturer’s OBD-II DTC catalogue, and Jatco CVT service information, confirm multiple temperature sensors on this model: the engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor (often integrated with the MAF), outside air temperature for HVAC/cluster, and on CVT models a transmission fluid temperature sensor used by the TCM.

On the 2014 Lancer, the ECT sensor under the bonnet tells the ECU how hot the engine is so it can manage cold starts, fuel delivery, ignition timing and radiator fan operation. The IAT helps fine-tune fuelling and spark based on the temperature of air entering the engine. CVT variants rely on transmission fluid temperature to adjust line pressure and ratio behaviour, and to protect the unit if the fluid overheats. All up, these sensors keep the engine efficient, the emissions clean and the driveline protected.

They’re not usually a scheduled replacement item, but they do age. As part of routine servicing (every 15,000 km or annually), a quick health check is smart:

• Scan live data when the engine is cold, ECT and IAT should read close to ambient. After warm-up, ECT typically stabilises around normal operating temperature.
• Look for fault codes like P0115–P0119 (ECT) and P0110–P0114 (IAT). Fans running constantly, rough cold starts, high fuel use, or a pegged gauge are classic clues.
• Inspect connectors for corrosion or coolant residue, and wiring for rub-through near the thermostat housing and intake ducting.

If replacement is needed, let the engine cool, relieve a little coolant pressure, unplug the sensor, and swap it for a quality OE-spec part. Refill with the correct Mitsubishi long-life coolant mix, bleed air, and verify temps with a scan tool. Avoid thread sealant unless specified, many sensors seal on a washer. For CVT models, note the fluid temp sensor is typically part of the internal harness and not a quick driveway swap—use proper CVT service intervals and the correct DiaQueen CVT fluid to keep temps in check.

Technical references: Mitsubishi Motors Lancer (2008–2017) Factory Service Manual—Engine Control and Cooling Fan Control, Mitsubishi OBD-II DTC listings applicable to 2014 Lancer, Jatco CVT control documentation for temperature-based pressure/range strategies.

• What are the signs a Lancer temperature sensor is failing?
• Can the CVT temperature sensor be replaced separately on a 2014 Lancer?
• How often should the ECT sensor be replaced?

What are the signs a Lancer temperature sensor is failing?
Common giveaways include the radiator fan running constantly or not at all, hard cold starts, uneven idle, poor fuel economy, a dead temperature gauge, and a check engine light with codes like P0115–P0119 or P0110–P0114. A quick scan-tool check of live data against ambient temperature is a handy first step.

Can the CVT temperature sensor be replaced separately on a 2014 Lancer?
On most Lancer CVT variants, the fluid temperature sensor is integrated with the transmission’s internal harness/valve body. It’s not generally serviced on its own without opening the transmission. Keeping the correct CVT fluid fresh and the cooler clean helps prevent temp-related issues.

How often should the ECT sensor be replaced?
There’s no fixed kilometre-based interval in the factory schedule. Replace it when test results are out of spec or symptoms appear. As a preventative measure on higher-kilometre cars, testing at each major service and replacing at the first sign of drift or connector damage is sensible.