Parts for your 2013 Suzuki Splash-Temperature sensors

2013 Suzuki Splash temperature sensors — purpose and servicing tips

Temperature sensors are absolutely fitted to the 2013 Suzuki Splash. Technical sources including the Suzuki Splash Service Manual (Engine Control System for K10B/K12B engines), Autodata’s vehicle technical and wiring information for the Splash (2013), and the Haynes/Opel Agila B–Suzuki Splash workshop coverage all show the Powertrain Control Module relying on an Engine Coolant Temperature (ECT) sensor and an Intake Air Temperature (IAT) sensor. Many variants also use an ambient air temperature sensor for HVAC and the instrument display, and automatic models monitor transmission fluid temperature.

On the Splash, the ECT sensor tells the ECU how hot the engine coolant is so it can adjust fuelling and ignition, manage the radiator fan, and protect the engine under extreme temps. The IAT sensor measures the temperature of incoming air to fine‑tune the air–fuel mix, depending on trim, it’s either built into the MAF or combined with the MAP sensor. The ambient sensor keeps the climate control honest and feeds the outside‑temp readout.

They’re not scheduled service items, but a bit of care goes a long way. If the Splash is running rich, idling high when warm, chewing through fuel, or throwing a check‑engine light with codes like P0115–P0119 (ECT) or P0110–P0114 (IAT), a temperature sensor or its wiring could be the culprit. Always scan it first before throwing parts at it.

• Coolant sensor care: Keep coolant fresh and at the correct spec. Old or contaminated coolant can mislead the ECT or corrode its seat. If replacing the ECT, start with a cold engine, catch and top up coolant, swap the sensor and seal, then bleed air from the system and verify fan operation.
• IAT checks: Make sure the air filter and intake ducting are clean and sealed. Oil from over‑oiled filters can foul a hot‑film sensor. If the IAT is integral to the MAF/MAP, replace the assembly as one piece if readings are out.
• Wiring and connectors: Under‑bonnet heat and road grime can stress plugs. Look for green corrosion, brittle insulation, or loose pins before blaming the sensor.

Most genuine sensors last years, so replacement is typically condition‑based rather than kilometre‑based. After any sensor work, clear fault codes and check live data to confirm the Splash is reading sensible temperatures from cold start to fully warm.

Popular questions

Where is the coolant temperature sensor on a 2013 Suzuki Splash?
It’s usually threaded into the thermostat housing or coolant outlet on the cylinder head. Look for a two‑pin electrical connector near the upper radiator hose area. Access is straightforward with basic spanners once the engine is cool.

Do temperature sensors need regular replacement on the Splash?
Not typically. They’re replaced when faulty. Regular coolant changes, keeping connectors clean, and fixing any intake leaks will help the ECT and IAT report accurately for the long haul.

What symptoms point to a bad IAT or ECT sensor?
Cold‑start struggles, a hunting or high idle when warm, poor fuel economy, the cooling fan running constantly, or a temp gauge that seems off. A scan tool showing implausible temperature readings versus actual engine condition is the giveaway.