Parts for your 2004 Honda Stream-Throttle position sensors

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

Yes, the 2004 Honda Stream uses a throttle position sensor. Honda’s RN1–RN5 workshop literature and the Honda Electronic Parts Catalogue both list a TPS on the Stream range: the 1.7‑litre D17A models (RN1/RN2) run a cable‑operated throttle body with a replaceable TPS, while the 2.0‑litre K20A i‑VTEC models (RN3/RN4) use electronic throttle control (drive‑by‑wire) with dual TPS tracks built into the throttle body assembly. Honda service manuals note that on the K‑series electronic throttle, the TPS isn’t serviced separately, the complete throttle body is replaced and a throttle/idle learn is performed afterward.

The TPS tells the engine control unit exactly how far the throttle plate is open. That live angle signal helps the ECU juggle fuel, ignition timing, transmission shift logic, and idle control so the Stream drives smoothly, pulls cleanly, and sips fuel when cruising. If the signal goes missing or drifts out of spec, the ECU can’t “read” the driver’s right foot properly.

• Common clues it’s on the fritz: erratic idle, flat spots on take‑off, poor fuel economy, harsh shifts (auto), or an illuminated check engine light with codes like P0120–P0123, P2135.
• Good practice during servicing: inspect the throttle body and connector, check for wiring chafe, and verify TPS data with a scan tool.

For D17A (1.7 cable throttle): the TPS is separate from the throttle body and can be replaced if testing shows dead spots or out‑of‑range readings. Replacement involves removing the old fasteners, fitting the new sensor, and setting the closed‑throttle position using a scan tool’s live data (or a multimeter) to the service‑manual spec before tightening. Afterward, clear codes and confirm smooth voltage sweep from closed to wide open. It’s smart to clean the throttle bore while you’re there.

For K20A (2.0 electronic throttle): the TPS is integrated into the drive‑by‑wire throttle body and isn’t a standalone service item. If the TPS fails, fit a quality replacement throttle body. Then carry out an electronic throttle/idle learn — ideally with Honda’s HDS, or perform a manual idle learn: warm the engine fully, all loads off (A/C, lights, rear demister), and let it idle undisturbed for several minutes until the radiator fan cycles. Recheck for codes and throttle angle plausibility.

There’s no fixed replacement interval for a TPS. Treat it as “inspect and test”: keep the connector clean and dry, ensure good battery voltage, and address any drivability symptoms promptly. These points reflect procedures described in Honda’s RN1–RN5 workshop manual (Fuel & Emissions, Throttle Body/ETC sections) and the Honda EPC listings for throttle/TPS assemblies on the Stream.

• Does a 2004 Honda Stream have a TPS?
  Yes. D17A models have a separate, adjustable TPS on the cable throttle body, K20A i‑VTEC models have dual TPS tracks integrated into the electronic throttle body. Honda’s RN1–RN5 workshop documentation and parts catalogue both specify these configurations.
• How do you reset or relearn the TPS after work on the throttle body?
  On K20A electronic throttles, use a scan tool (HDS preferred) to run the throttle/idle learn after fitting or cleaning. If a scan tool isn’t available, perform a manual idle learn: warm the engine, switch off all accessories, and let it idle without touching the pedal until the fan cycles. On D17A cable throttles, after TPS replacement, set closed‑throttle angle to spec with live data, then clear codes and confirm smooth response.
• Can a TPS be cleaned, or should it be replaced?
  The sensor itself is sealed — don’t open it. Cleaning the throttle plate and electrical connector can help with minor drivability gripes. If testing shows a dead spot or out‑of‑range signal, replace the TPS (D17A) or the throttle body assembly (K20A).