Parts for your 2008 Suzuki Splash-Temperature sensors

2008 Suzuki Splash Temperature Sensors — Purpose, upkeep, and when to replace

Technical sources confirm the 2008 Suzuki Splash is fitted with temperature sensors that are critical to engine management. The Suzuki workshop/service manual for K10B/K12B engines (Engine Control System section) lists an Engine Coolant Temperature (ECT) sensor and an Intake Air Temperature (IAT) sensor among the key inputs to the ECM. Diagnostic references such as Suzuki OBD-II DTC charts also show codes P0115/P0117/P0118 for the ECT circuit and P0110 for the IAT circuit, further verifying their presence and function on this model year.

On this Splash, the ECT sensor monitors coolant temperature so the ECU can sort cold starts, fuel mixture, ignition timing, idle speed, and when to kick the radiator fan on. The IAT sensor reports the temperature of the air coming into the engine, helping fine-tune fuelling for both performance and economy. Without accurate readings, the Splash can run rich or lean, chew through more fuel than it should, and throw the check engine light.

They’re not routine replacement items, but they do benefit from a bit of attention during servicing. Under the bonnet, a tech should:

• Scan live data to confirm realistic coolant and intake air temps (compare to ambient when cold).
• Inspect connectors and wiring for corrosion, loose pins, or brittle insulation.
• Keep the cooling system healthy with timely coolant changes, old coolant can encourage scale that interferes with sensor accuracy.

Signs a temperature sensor’s on the way out include hard cold starts, rough idle, poor fuel economy, black exhaust smoke on start-up, the cooling fan running constantly, a dead or erratic temp gauge, and related DTCs. If replacement’s needed, the ECT sensor is typically mounted near the thermostat housing or water outlet, the IAT may be integrated with the MAF or located in the intake duct. Always de-pressurise and cool the cooling system before removing the ECT sensor to avoid burns. Fit a new O-ring or sealing washer as required, torque to workshop spec, top up with the correct coolant mix, and bleed air from the system. For the IAT, ensure the sensor tip is clean, the sealing grommet is snug, and the harness clip is re-secured to avoid false readings. Done right, the Splash will warm up neatly, idle cleanly, and sip fuel the way it should.

Popular questions about 2008 Suzuki Splash temperature sensors

Where is the coolant temperature sensor on a 2008 Suzuki Splash?
On most Splash variants (K10B/K12B), the ECT sensor sits on or near the thermostat housing/water outlet on the engine. It’s accessible from the top with the air intake duct moved aside. A scan of live data before wrenching helps confirm you’re on the right component.

Do temperature sensors need regular replacement?
Not usually. They’re replaced when faulty. Regular cooling system servicing, checking wiring/connectors, and verifying scan-tool readings during scheduled maintenance will extend their life and catch issues early.

What happens if the ECT sensor fails on a Splash?
The ECU may default to a fail-safe value, causing rich running, poor cold starts, higher fuel use, and constant radiator fan operation. You’ll often see the check engine light and related DTCs. Replacing the sensor and clearing codes generally restores normal behaviour.