Parts for your 2018 Mitsubishi Eclipse cross-Temperature sensors

2018 Mitsubishi Eclipse Cross Temperature Sensors

Temperature sensors are absolutely relevant and used on the 2018 Mitsubishi Eclipse Cross. Technical sources back this up: Mitsubishi service information for the 2018 Eclipse Cross (GK/GL series) details engine management inputs that include an engine coolant temperature (ECT) sensor and intake air temperature (IAT) sensing, while the owner’s manual shows an outside temperature display that relies on an ambient sensor. On the diagnostics side, OBD‑II standards (SAE J1979) define coolant and intake air temperature PIDs and fault codes such as P0115 (ECT circuit) and P0110 (IAT circuit), which this model supports. The CVT also monitors fluid temperature, and the HVAC system uses an evaporator temperature sensor to manage demist and cooling performance.

In plain terms, these sensors are the quiet achievers under the bonnet. The ECT sensor tells the ECU how warm the engine is so it can sort cold starts, fuel mixture, idle speed, ignition timing and when to kick the radiator fans on. IAT helps with fuelling and turbo response by reporting how hot or cool the intake charge is. The ambient sensor feeds the dash and climate control, and the evaporator sensor prevents the air‑con from icing up. CVT fluid temperature helps the transmission manage shift strategy and protect itself on hot days or steep climbs.

There’s no fixed replacement interval for temperature sensors on the Eclipse Cross, they’re serviced on condition. During routine servicing, a quick scan with a proper diagnostic tool to check live data (coolant temp rise from cold, IAT tracking ambient, evap temp behaviour) is smart. Inspect connectors for corrosion or broken tabs, and make sure coolant quality is up to scratch—contaminated coolant can shorten an ECT’s life. If the ECT is replaced, depressurise the cooling system, use the correct coolant, bleed air properly and torque the sensor to spec without gooping the threads unless the service manual calls for it. For IAT, note that it may be integrated into the MAF or a manifold pressure sensor depending on variant, clean gently with MAF‑safe cleaner if contaminated, never with harsh solvents. After any work, clear codes and confirm normal readings on a road test.

• Common clues of a dodgy temp sensor: hard cold starts, rough idle, poor fuel economy, radiator fans running oddly, weak air‑con or foggy windows, CVT going into protection mode, and a check‑engine light.

Popular questions

Where is the engine coolant temperature sensor on a 2018 Mitsubishi Eclipse Cross?
Typically it’s threaded into the thermostat housing or cylinder head near the upper radiator hose, where it can “see” coolant flow. Access is usually from the top of the engine bay. Exact placement can vary by engine code and market, so checking VIN‑specific service information is best.

Is the IAT sensor in the MAF or the manifold on this model?
Many Eclipse Cross variants integrate intake air temperature sensing into the mass airflow (MAF) sensor near the airbox. Others use a combined manifold absolute pressure/intake temperature (T‑MAP) sensor on the intake tract. A quick look for a small 2–4 pin sensor in those spots—or a scan‑tool PID check—will confirm which setup the vehicle has.

When should temperature sensors be replaced?
They’re replaced on evidence, not mileage. If there are fault codes, implausible live‑data readings, obvious wiring damage, or symptoms like hard starts and poor economy, test first and replace the faulty sensor with an OEM‑spec unit. No special programming is typically needed—clear codes and verify normal operation.