Parts for your 2015 Suzuki Splash-Throttle position sensors

2015 Suzuki Splash throttle position sensor (TPS)

Based on technical sources such as the Suzuki Splash/Ritz K12B service manual (Throttle Body Control System and TP Sensor sections), Autodata specifications for Splash 1.2 K12B (2010–2015), and Suzuki’s electronic parts catalogue (Group 13 listing throttle body assemblies 13400-68Lxx with integrated sensors), the 2015 Suzuki Splash is fitted with a throttle position sensor. On the 1.2‑litre K12B petrol, the TPS is built into the electronic throttle body as dual tracks (TP1/TP2) for redundancy. On the 1.3 DDiS diesel, the throttle valve used for EGR/shutdown also carries a position sensor. So, TPS is absolutely relevant to this model.

On a 2015 Splash, the TPS tells the engine control module exactly how far the throttle plate is open. That live angle data helps the ECU sort fuelling, ignition timing, idle speed control, cruise control behaviour, and emissions. It also helps the ECU cross‑check the accelerator pedal sensors for safety, reducing the chance of unintended throttle issues. If that signal goes flaky, owners often notice hesitation, idle hunting, limp‑home mode, higher fuel use, or the cruise dropping out, usually alongside a Check Engine Light and codes like P0120–P0124 or P2135.

There’s no fixed replacement interval for the TPS on a Splash because it’s solid‑state and integrated into the throttle body. As part of regular servicing, a smart approach is:

• Scan for fault codes and check live data for smooth, matching TP1/TP2 traces and sensible idle angle.
• Inspect the throttle body and connector for moisture, corrosion, or chafed wiring.
• Clean the throttle bore with sensor‑safe throttle cleaner if deposits are building up. Don’t lever the butterfly open aggressively and avoid drowning the shaft seals.

If the TPS signal is out of range or the tracks disagree, the fix on the K12B petrol is to replace the complete throttle body assembly (the TPS isn’t designed to be serviced separately). After refitting, a throttle/idle learn is required — best done with a scan tool, though many workshops can complete an idle relearn procedure after battery disconnect. It’s worth checking the accelerator pedal position sensors at the same time, as the ECU validates those against the TPS. Quality parts and a fresh gasket help prevent air leaks that would otherwise mess with idle trims.

With clean intake air, good battery voltage, and tidy wiring, the TPS on a Splash should run happily for hundreds of thousands of kilometres.

What are common symptoms of a failing TPS on a 2015 Suzuki Splash?

Typical signs include a Check Engine Light, hesitant take‑off, flat spots on light throttle, idle surging, poor fuel economy, cruise control not engaging, and occasionally limp‑home mode. Scan tools often show codes like P0120–P0124 or P2135, and live data may reveal erratic or mismatched TP1/TP2 signals.

Can the TPS be replaced separately on the Splash K12B, or is it part of the throttle body?

On the 1.2 K12B petrol, the TPS is integrated into the electronic throttle body and isn’t intended to be serviced on its own. Most workshops replace the full throttle body assembly. While some aftermarket solutions claim a stand‑alone sensor, proper fit, calibration and reliability can be hit‑and‑miss compared with the complete unit.

Does the ECU need a relearn after replacing the throttle body/TPS?

Yes. A throttle/idle relearn ensures the ECU knows the new throttle’s fully closed and fully open positions, stabilising idle and tip‑in. The preferred method is via a scan tool using the manufacturer’s procedure. If that isn’t available, workshops may perform an idle relearn after battery reset, allowing the ECU to adapt during a controlled warm‑up cycle.