Parts for your 2008 Suzuki Sx4-Throttle position sensors

2008 Suzuki SX4 throttle-position-sensors

Yes, the 2008 Suzuki SX4 uses a throttle-position sensor (TPS). Suzuki’s 2007–2009 SX4 Service Manual (Engine Control/ECM section) specifies an electronic throttle body with an integrated throttle position sensor, and lists diagnostic trouble codes P0120–P0123 for the TPS circuit. Suzuki’s OEM parts catalogues also show the throttle body assembly incorporating the sensor rather than a separate, bolt-on unit. So for this model, a TPS is absolutely relevant and part of normal engine management.

On the 2008 SX4, the TPS tells the engine computer exactly how far the throttle plate is open, matching driver demand from the accelerator pedal with fuel and ignition control. Because the SX4 is drive-by-wire, the ECU cross-checks the accelerator pedal position sensors with the throttle-position sensor to deliver smooth, efficient power. A healthy TPS means crisper throttle response, sensible fuel economy on long Kiwi and Aussie runs, and a stable idle with the air con or lights on.

As part of servicing your 2008-suzuki-sx4 throttle-position-sensors system, it’s smart to scan for fault codes and look at live data for throttle angle at closed throttle and wide-open throttle. Typical behaviour is around 0.5–0.7 V equivalent at closed throttle and roughly 4.0–4.5 V at full tilt, with a clean, linear sweep. If there’s a flat spot, jumpy readings, or codes like P0122/P0123, check the connector for corrosion, ensure the throttle plate isn’t gummed up, and verify good power and earth. When cleaning the throttle body, use a cleaner that’s safe for coated throttles, don’t force the plate by hand, and perform an idle/throttle relearn with a scan tool or the prescribed key-on procedure after battery disconnection.

If replacement is needed, note that on many SX4s the throttle-position sensor is integrated and non-serviceable separately—so the fix is a complete throttle body assembly. Fit a quality unit, replace the gasket, and torque fasteners evenly. Clear codes, carry out a throttle/adaptation reset, and confirm stable idle and smooth pedal response on a short road test. Keeping this sensor happy helps the SX4 avoid hunting idle, hesitant take-offs, and unnecessary fuel burn across Aussie highways and New Zealand’s twistier kilometres.

• Where is the throttle-position sensor on a 2008 Suzuki SX4?
• What are common symptoms of a failing TPS on an SX4?
• Does the TPS need calibration after replacement?

Where is the throttle-position sensor on a 2008 Suzuki SX4?
It’s built into the electronic throttle body mounted on the intake manifold, under the bonnet. Unlike older designs, it isn’t a separate, easily unbolted sensor, it’s part of the throttle assembly that the ECU controls.

What are common symptoms of a failing TPS on an SX4?
Drivers often notice erratic idle, hesitation on take-off, flat spots, poor fuel economy, or the check engine light. Scan tools may show DTCs like P0120–P0123 and a jumpy or stuck throttle-angle reading during a live-data sweep.

Does the TPS need calibration after replacement?
Yes—after replacing the throttle body or disconnecting the battery, perform a throttle/adaptation relearn. Many scan tools can run this routine, otherwise, follow the service-manual key-on procedure. This helps the ECU learn the new closed and open positions for smooth operation.