Parts for your 2009 Suzuki Splash-Throttle position sensors

2009 Suzuki Splash throttle position sensor (TPS): what it does and how to look after it

Based on technical sources, the 2009 Suzuki Splash does use a throttle position sensor. Suzuki’s factory service literature for the K10B/K12B petrol engines (Engine Control System section, DTC P0120–P0124, P2135) specifies dual-track throttle position sensing within the electronic throttle body, monitored by the ECM for plausibility. Independent databases such as Autodata/AllData for the 2008–2014 Splash/Agila B list TP sensor pin voltages and adaptation steps after throttle-body replacement. This setup is typical of drive-by-wire throttle systems of the era and confirms the TPS is relevant and fitted on the 2009 Splash.

The TPS in a 2009 Suzuki Splash tells the engine computer exactly how far the throttle plate is open, so it can meter fuel, manage ignition timing, stabilise idle, and keep emissions in check. On the Splash’s petrol engines (K10B/K12B), the sensor is built into the electronic throttle body, usually as a dual-channel unit for redundancy. If those two signals don’t agree, the car can jump into limp mode to protect the engine and you’ll see the check engine light.

What does that mean for everyday servicing? There’s no set replacement interval for the TPS, but it pays to keep the throttle body clean and the connector in good nick. Under the bonnet, avoid forcing the throttle plate by hand, with drive-by-wire you can damage the gears or sensor tracks. If the idle’s rough, the Splash hesitates off the line, hunts at cruise, uses more fuel than usual, or logs codes like P0120–P0124 or P2135, it’s time to scan live data and check the TPS tracks. Voltage should sweep smoothly with no dead spots.

If the TPS has failed, it’s commonly replaced with the complete throttle body assembly. After refitting, a throttle adaptation (relearn) with a scan tool is often required so the ECM knows the new closed and wide-open positions. Some vehicles learn automatically after key cycles, but a proper adaptation avoids a high idle or sluggish response. While you’re there, inspect the intake boot for splits, clean the throttle bore with sensor-safe cleaner, and make sure earths and battery voltage are solid—low volts can throw false throttle faults.

• Tell-tale symptoms: check engine light, limp-home, flat spots, stalling at lights, high idle, poor economy.
• Quick tips: don’t twist the plate by hand, use contact cleaner on the plug, and perform a throttle relearn after work.

Popular questions about 2009 Suzuki Splash throttle position sensors

Does the 2009 Suzuki Splash have a separate TPS or is it built into the throttle body?
On most 2009 Splash petrol models, the TPS is integrated into the electronic throttle body as a dual-track sensor and isn’t sold separately. If the sensor fails or the tracks wear, the usual repair is a complete throttle body replacement, followed by an adaptation procedure so the ECM can learn the new positions.

What are common symptoms and fault codes of a crook TPS on a Splash?
Drivers often notice hesitation, rough idle, limp mode, or a flashing check engine light. Typical fault codes include P0120–P0124 (throttle position circuit range/performance, low, or high) and P2135 (TPS correlation). Always check for intake leaks and clean the throttle before condemning the sensor.

Do you need a throttle relearn after replacing the throttle body or disconnecting the battery?
Yes—after throttle body replacement, a relearn with a suitable scan tool is recommended. Some vehicles will self-learn after several key-on cycles and a short drive, but a guided adaptation prevents high idle and lazy throttle response. A battery disconnect alone may trigger a brief relearn period.