Parts for your 2020 Suzuki Splash-Temperature sensors

2020 Suzuki Splash Temperature Sensors

Based on established technical documentation, temperature sensors are absolutely relevant and used on the Suzuki Splash. Suzuki’s factory workshop manuals for the Splash/Ritz with K-series engines (K10B/K12B) describe an Engine Coolant Temperature (ECT) sensor and an Intake Air Temperature (IAT) sensor as core inputs to the engine control unit. The Cooling and Engine Control System sections detail how the ECT drives fuel, ignition, idle speed and radiator fan logic. Likewise, SAE J1979/ISO 15031 OBD‑II standards define live data and fault codes for these sensors (e.g., P0115–P0119 for ECT, P0110–P0114 for IAT), which are supported by Splash ECUs. Parts catalogues and Denso/Bosch engine management references for K‑series engines also list NTC‑type temperature sensors for coolant, intake air and, in some variants, ambient temperature for HVAC. So, a 2020‑era Splash (where sold) definitely uses temperature sensors as standard EFI hardware.

On a 2020 Suzuki Splash, temperature sensors quietly keep everything under the bonnet humming along. The ECT sensor tells the ECU how warm the engine is so it can sort cold starts, fine‑tune fuelling and ignition timing, kick the radiator fan in, and keep emissions tidy. The IAT sensor measures the temperature of the air coming through the airbox, helping the ECU correct for air density and the Aussie or Kiwi climate. Many cars also carry an ambient temp sensor for the air‑con and display, and autos may monitor transmission temperature too.

They’re robust little thermistors and aren’t a scheduled replacement item, but they do deserve a look during regular servicing. A quick scan of live data, checking that coolant and intake temps look realistic on a cold start and after a run, goes a long way. Common clues something’s off include:

• Hard cold starts, hunting idle, or heavy fuel use
• Cooling fan running constantly or not at all
• Temp gauge misbehaving, or air‑con performance going weird
• Check Engine Light with ECT/IAT fault codes

If an ECT sensor needs replacing, let the engine cool completely. Don’t pop the radiator cap hot. Disconnect the plug, swap the sensor and sealing washer/O‑ring, top up with the correct Suzuki‑approved coolant mix, and bleed the system properly to avoid airlocks. Stick with quality OEM‑spec parts and keep connectors clean and corrosion‑free.

IAT sensors often live in the airbox or are built into the MAF/MAP assembly. If it’s just dirty, a gentle clean with proper MAF/IAT cleaner can restore readings—avoid touching the sensing element. If readings are implausible or codes persist, replace the unit rather than trying to “hack” it.

Pro tip for local conditions: big swings in ambient temperature across Australia and New Zealand mean these sensors work hard. A yearly scan and a visual once‑over during your Splash’s service will keep the ECU happy, economy sharp, and the fan cycling exactly when it should.

Popular questions about 2020 Suzuki Splash temperature sensors

Where is the engine coolant temperature (ECT) sensor located?
On most Splash K‑series engines it’s threaded into the thermostat housing or the cylinder head near the coolant outlet. Look for a two‑pin connector in that area. Access is usually from the top with the engine cover off.

Can a dodgy ECT sensor hurt fuel economy?
Yes. If the ECU thinks the engine’s cold when it isn’t, it enriches the mixture, leading to rough running, high idle, and more trips to the servo. Fixing an out‑of‑range ECT typically restores smooth starts and better economy.

Do temperature sensors need routine replacement?
Not by schedule. They’re replaced on condition—fault codes, implausible scan data, or confirmed test failures. During service, check live data and connectors. Replace with quality parts if values are out or the sensor is physically damaged.