Parts for your 2019 Suzuki Splash-Temperature sensors

2019 Suzuki Splash temperature sensors — what they do and how to look after them

Based on Suzuki’s K12B/K10B engine service information, the Maruti Suzuki Ritz (the Splash’s twin) workshop manual, and Suzuki OBD-II diagnostic documentation listing ECT and IAT sensor fault codes (for example P0115–P0119, P0125/P0128), this model is absolutely fitted with temperature sensors. The Suzuki electronic parts catalogues for Splash/Ritz also show engine coolant temperature (ECT) and intake air temperature (IAT) sensors as standard items on petrol variants. So yes — temperature sensors are relevant and used on the 2019 Suzuki Splash.

On a Splash, temperature sensors are small but mighty. The engine coolant temperature (ECT) sensor tells the ECU how hot the engine is so it can sort cold starts, set the idle nicely, switch the radiator fan, and protect the motor if things get toasty. The intake air temperature (IAT) sensor helps fine‑tune fuelling and timing for smooth running and decent economy. There’s also an ambient temp sensor for the dash/HVAC, and if it’s an automatic, the transmission control may monitor fluid temperature too.

There’s no fixed replacement interval for these sensors, they’re serviced on condition. As part of regular maintenance under the bonnet, it’s smart to:

• Scan live data: Compare ECT and IAT readings to the actual cold start temperature — they should be close. After warm‑up, ECT should track the thermostat rating.
• Inspect wiring/connectors: Look for corrosion, brittle looms near the thermostat housing or airbox, and loose plugs.
• Mind the coolant: Old or contaminated coolant can attack sensors. Stick to the correct Suzuki‑spec coolant, flush on schedule, and bleed air properly.

Typical symptoms of a drifting or failed sensor include hard cold starts, high fuel use, rough idle, a fan that runs at odd times, a dead temperature gauge, or codes like P0115–P0119/P0128. If you’re replacing the ECT sensor, let the engine cool, catch any coolant, swap the sensor with a new seal, torque it to spec, refill/bleed, then check for leaks and verify readings. The IAT is often in the airbox or integrated into the MAF — clean gently with proper MAF cleaner if it’s just dirty, and replace if readings are off.

Use quality OEM or reputable aftermarket sensors, cheap no‑name bits can read wonky and waste petrol. A quick check at each service keeps things tidy and helps the Splash run sweet as, with no dramas.

• Where is the coolant temperature sensor on a Suzuki Splash?
  On the K12B 1.2‑litre, the ECT sensor is typically threaded into the thermostat housing or coolant outlet at the cylinder head, accessible from the top/front of the engine. On the K10B 1.0‑litre, it’s likewise near the coolant outlet on the head. A torch and a small socket usually do the trick.
• Does the Splash have more than one temperature sensor?
  Yes. It uses at least an ECT and an IAT. Many cars also have an ambient air temp sensor for the dash and climate control, and autos may monitor transmission fluid temperature.
• How often should a temperature sensor be replaced?
  There’s no set interval. Test if you notice poor starting, rough running, odd gauge behaviour, or fault codes. After 8–10 years it’s reasonable to test more often and consider preventive replacement if data is unstable.