Parts for your 2014 Suzuki Splash-Temperature sensors

2014 Suzuki Splash temperature sensors

Based on the Suzuki Splash/Ritz factory workshop information for the K12B petrol engine (Engine Control System section), Autodata Service & Repair coverage for 2014 Splash, and standard Bosch/Denso engine management references, the 2014 Suzuki Splash is absolutely fitted with temperature sensors. Key examples include the engine coolant temperature (ECT) sensor for the ECU, an intake air temperature (IAT) sensor (integrated in the airflow/pressure sensing), an ambient air sensor for the HVAC/outside temp display, and—on automatic variants—an ATF temperature input within the transmission control. So yes, temperature sensors are relevant and used on this model.

On the Splash, temperature sensors quietly keep everything tidy under the bonnet. The ECT sensor is the big one: it tells the ECU how hot the engine is so fuelling, ignition timing and idle speed stay spot on from cold start to highway cruise. It also cues the thermo fans and works with the A/C logic to prevent overheating in traffic. The IAT sensor helps trim fuelling for dense, cool morning air versus a scorching arvo. If your Splash has an auto, the transmission temp input helps manage shift quality and protect the fluid. The ambient sensor feeds the climate control and the dash temperature readout.

They’re small parts, but when they drift out of spec they cause annoying issues—hard cold starts, rough idle, poor economy, lazy fans, or the temp gauge doing weird things. During servicing, a quick scan-tool check of live data is gold: compare ECT to the actual cold engine (should be close to outside temp), confirm smooth warm-up to operating temp (about 85–95°C), and make sure the radiator fans cut in as expected.

• Signs a temp sensor needs attention: long cranking when cold, rich fuel smell, unexpected cooling fan operation, erratic temp gauge, A/C cutting in/out oddly, or a Check Engine Light with P0115–P0119/P0125 style codes.
• Good practice: inspect connectors for green corrosion, cracked housings or oil/coolant contamination, replace brittle seals, and keep correct Suzuki-spec coolant fresh so the sensor tip isn’t attacked by old coolant.

Replacement is usually straightforward: disconnect the battery, let the engine go stone cold, relieve any coolant pressure, swap the sensor with a new seal, top up the correct coolant mix and bleed air. Don’t overtighten—use a torque wrench if possible. After refitting, clear codes and confirm fan engagement and stable temps on a test drive. Most owners won’t have a set interval for replacement—treat it as condition-based: test when drivability changes or any cooling faults pop up.

• Pro tip: if the gauge reads cold forever but the top radiator hose is hot, suspect the ECT sensor or its wiring rather than the thermostat—and verify with live data before throwing parts at it.

Popular questions

How long do temperature sensors last on a 2014 Splash?
They’re designed to last well over 150,000 km, and many go the life of the car. Heat cycles, poor-quality coolant, or connector corrosion can shorten that. If the live data looks odd or there are fault codes, it’s time to test and possibly replace.

Can a dodgy ECT sensor cause poor fuel economy?
Yes. If the ECU thinks the engine is colder than it is, it enriches the mixture, drinks more fuel and can foul plugs. You might also see high idle and the cooling fans behaving strangely. A quick scan will confirm if the ECT reading matches reality.

Do I need to drain all the coolant to change the ECT sensor?
Not usually. On a stone-cold engine you can capture a small coolant loss by cracking the sensor quickly and topping up afterwards. Have new coolant ready and bleed the system properly to avoid air pockets.