Parts for your 2004 Daihatsu Yrv-Throttle position sensors

2004 Daihatsu YRV throttle position sensor (TPS) — what it does and how to look after it

Yes, the 2004 Daihatsu YRV uses a throttle position sensor. Daihatsu’s own workshop literature for the YRV (M200/M201, K3‑VE and K3‑VET engines) describes the TPS within the engine control (EFI) system and lists TPS-related diagnostic trouble codes (P0120–P0124), confirming it’s fitted. The Daihatsu Electronic Parts Catalogue for the YRV throttle body also itemises a throttle position sensor on these engines. Denso throttle bodies used on K3-series engines routinely incorporate a 3‑wire or 4‑wire TPS, matching what’s shown in the YRV service wiring diagrams. These technical references make it clear the sensor is relevant to this model year.

On a 2004 YRV, the TPS tells the ECU exactly how far the throttle plate is opened when the driver presses the pedal. That live angle signal lets the ECU meter fuel, tweak ignition timing and manage idle control. When the TPS is healthy, the YRV pulls cleanly off the line, shifts smoothly in autos and keeps its fuel economy on point around town.

Because the TPS is a solid-state potentiometer or hall sensor mounted to the throttle body, there’s no scheduled replacement interval. It’s a replace-when-faulty item. Still, it deserves attention during routine servicing. A technician will usually:

• Inspect the TPS connector for corrosion, loose pins or chafed wiring under the bonnet.
• Clean the throttle body bore and plate with sensor-safe cleaner to prevent sticky movement that can mimic TPS faults.
• Scan for EFI codes and check live data for smooth throttle angle change from closed to wide open without flat spots.

Typical red flags on a YRV include erratic idle, flat acceleration, sudden hesitation, or an illuminated MIL with codes like P0120/P0121. If replacement’s needed, the sensor is mounted to the side of the throttle body with small screws. Most YRV units are factory-set, fitting the new sensor and performing an idle/throttle learn with a scan tool (or the approved key-on procedure) restores correct readings. Avoid forcing the throttle plate by hand, and don’t flood the sensor with solvent.

Quality matters here. Choosing an OE-spec sensor and reseating the connector seal properly helps the YRV stay reliable over big kilometres, whether it’s the naturally aspirated K3‑VE or the punchy turbo K3‑VET.

Popular questions about 2004 Daihatsu YRV throttle position sensors

Does the 2004 YRV TPS need calibration after replacement?
Most 2004 YRV throttle bodies use a factory-indexed TPS that doesn’t require manual adjustment. After replacement, it’s good practice to run an idle/throttle learn with a scan tool or follow the service manual’s reset procedure so the ECU relearns closed and part-throttle positions.

What symptoms point to a failing TPS on a YRV?
Common signs include hunting or high idle, flat spots on light throttle, sudden surging, poor kickdown in auto models and a check engine light with codes like P0120–P0124. Viewing live data will often show the throttle angle jumping or not tracking smoothly as the pedal is moved.

Can the TPS be replaced separately from the throttle body?
On most 2004 YRV variants, yes. The TPS is mounted to the throttle body with small screws and has a sealed connector. If the throttle shaft or plate is sticky or heavily worn, however, it can be smarter to replace or recondition the complete throttle body assembly.