Parts for your 2012 Honda Elysion-Throttle position sensors

2012 Honda Elysion throttle position sensor: fitted, what it does, and how to look after it

Based on Honda service literature for the RR-series Elysion (PGM-FI with Electronic Throttle Control), Honda Drive‑By‑Wire training material, and typical OBD-II diagnostics for Honda throttle systems (DTCs such as P0121–P0123, P0221–P0223, P2135), the 2012 Honda Elysion does use throttle position sensors. They’re integrated into the electronic throttle body as dual sensors (Sensor A/B), with a separate dual-track accelerator pedal position sensor on the pedal. So, throttle position sensors are absolutely relevant on this model, even though they’re not a separate bolt-on part.

On a 2012 Elysion, the throttle position sensors tell the ECU the exact angle of the throttle plate. Coupled with the pedal sensor and the throttle actuator motor, they let the ECU meter air precisely for smooth idle, crisp response, proper transmission shifting, and clean emissions. Because the sensors are built into the throttle body, Honda generally supplies them as part of the complete assembly rather than individually.

When it comes to servicing, there’s no fixed replacement interval for the TPS. Instead, it’s all about condition and correct signals. During regular servicing—say every 20,000–30,000 kilometres—technicians will scan for fault codes, review throttle data, and visually inspect the throttle body. If drivability issues pop up (hesitation, hunting idle, poor economy, sudden limp mode, or an illuminated MIL), TPS data is a prime suspect.

• Common clues of TPS trouble:
  • Check Engine Light with codes like P0121, P0122, P0123, P0221, P0222, P0223, or P2135
  • Flat spots, surging, or stalling at idle
  • Inconsistent kickdown or early/late shifts

Good maintenance starts with a clean throttle. At service time, a careful throttle body clean can restore smooth airflow—just don’t force the plate open or soak the sensor area. Use throttle-safe cleaner, fit a new gasket if the body is removed, and keep solvents away from the motor/sensor housing.

If the TPS readings are out of spec or the assembly is faulty, the fix is usually a new throttle body. After refit, perform an idle/throttle relearn so the ECU can recalibrate: bring the engine to operating temp, switch off loads (A/C, lights), and let it idle for several minutes, a scan tool idle learn is even better. Clear codes, verify live data tracks smoothly from closed to wide-open throttle, and confirm a stable idle and normal shifts on a road test. Using a quality OEM throttle body and following torque specs helps avoid repeat issues.

Popular questions about 2012 Honda Elysion throttle position sensors

Does the 2012 Elysion have a separate, replaceable TPS?
Not typically. On this model the TPS is integrated into the throttle body as dual sensors. Honda usually doesn’t sell the TPS separately, so replacement means fitting a complete throttle body. Some aftermarket options claim standalone sensors, but reliability can be hit and miss compared with an OEM assembly.

How do you reset or relearn the throttle after cleaning or replacement?
Warm the engine fully, switch off all accessories, and let it idle undisturbed for several minutes. Many workshops also use a scan tool to command an idle/throttle relearn. After that, take a gentle drive so the ECU can fine‑tune trims. If the idle wanders or a MIL returns, recheck for air leaks and clear any stored codes.

What fault codes point to TPS issues on a 2012 Elysion?
Common codes include P0121–P0123 (TPS A range/performance/low/high), P0221–P0223 (TPS B), and P2135 (A/B correlation). You may also see pedal sensor codes if there’s a mismatch. Any of these warrant data logging of throttle angle, pedal position, and commanded vs actual throttle to confirm the fault before parts are replaced.