Parts for your 2010 Honda Stream-Throttle position sensors

2010 Honda Stream throttle position sensor (TPS) — what it does and how to look after it

Based on technical sources including Honda’s 2007–2011 Stream (RN6–RN9) Service Manual ETCS section and the Honda Electronic Parts Catalogue, the 2010 Honda Stream does use throttle position sensors. In this model, the electronic throttle body houses dual throttle position sensors (TPS A and TPS B), and the accelerator pedal carries its own dual-position sensor. The ECU constantly cross-checks these signals, with diagnostic coverage via OBD-II DTCs such as P0121–P0123, P0221–P0223 and P2135.

On the road, the TPS tells the ECU exactly how far the throttle plate is open. That data is blended with airflow, engine speed and temperature info to nail fuelling and ignition timing, smooth out idle, keep cruise control tidy and coordinate with the auto transmission for clean shifts. The dual-sensor setup is there for redundancy and safety, if the two tracks disagree, the ECU can drop the vehicle into limp-home to prevent runaway throttle.

Servicing-wise, the TPS on a 2010 Stream is integrated into the electronic throttle body, so it’s not a separate bolt-on item. Routine care focuses on the throttle body itself: a gentle clean every 30,000–50,000 km (more often in dusty conditions) helps prevent sticky throttle behaviour and erratic idle. Use throttle-body-safe cleaner sparingly, avoid flooding the shaft seals or washing solvent into the sensor cavity, and let it dry before starting. After cleaning or battery disconnect, an idle learn is smart practice: bring the engine to operating temperature, hold 3,000 rpm until the radiator fan cycles on, then let it idle for five minutes with all accessories off.

If fault codes such as P0122, P0223 or P2135 return after wiring and connector checks, replacement typically means fitting a complete throttle body assembly with a new gasket. Once installed, clear codes and perform the idle/throttle learn. A scan tool that can monitor live data (throttle angle A/B agreement and percentage sweep) is handy for confirming a smooth, linear signal. It’s also worth inspecting the accelerator pedal position sensor and harness routing, as correlation faults can stem from either end of the drive-by-wire system.

• Common symptoms: inconsistent idle, flat spots, sudden limp mode, cruise control cancelling, poor fuel economy and a glowing check engine light.
• Quick checks: secure grounds, clean connectors, look for rubbed-through loom near the throttle body and intake.
• Good habits: quality air filters, regular throttle body inspections and avoiding aggressive solvent use protect the TPS over the long haul.

FAQs

Does the 2010 Honda Stream have a replaceable TPS, or is it part of the throttle body?
For this model, the TPS is built into the electronic throttle body as dual sensors. If the TPS fails verification after wiring checks, the usual repair is replacing the entire throttle body assembly and then carrying out the idle/throttle learn routine.

What fault codes point to a TPS issue on a 2010 Stream?
Typical codes include P0121–P0123 (TPS A range/performance, low, high), P0221–P0223 (TPS B range/performance, low, high) and P2135 (throttle position sensor A/B correlation). Drivers may notice erratic throttle response, limp mode and poor shift quality alongside these codes.

How often should the throttle body be cleaned on a 2010 Stream?
Every 30,000–50,000 km suits most Australian and New Zealand conditions. Short-trip or dusty use may call for more frequent attention. After cleaning, complete an idle learn so the ECU can recalibrate the throttle opening at idle.