Parts for your 2010 Honda Elysion-Throttle position sensors

2010 Honda Elysion Throttle Position Sensors (TPS) — What They Do and How to Look After Them

Based on Honda technical literature for the PGM-FI system and Electronic Throttle Control (ETCS) used across late-2000s Honda platforms, including the Elysion’s K24A and J-series V6 variants, the 2010 Honda Elysion is fitted with throttle position sensors. Honda’s service manuals describe dual throttle position sensors (TP Sensor A/B) built into the electronic throttle body, working alongside an accelerator pedal position (APP) sensor. Common Honda OBD-II references list TP-related DTCs (e.g., P0121–P0123, P0221–P0223) for these models, confirming the TPS is relevant and monitored by the ECU.

The throttle position sensors tell the ECU exactly how far the throttle plate is open. That signal drives fuel delivery, ignition timing, automatic transmission shift strategy, cruise control, traction/stability logic and idle quality. On the Elysion’s drive-by-wire setup, the TPS pair also provides redundancy and plausibility checks, so if readings don’t agree, the ECU can jump into failsafe to protect the engine and transmission.

Typical signs the TPS is on the way out include:

• Surging, flat spots or hesitation off the line
• Hunting/rough idle, stalling at lights, or high idle after cleaning
• Poor fuel economy and a lit check engine lamp (often with TP/APP codes)
• Harsh or odd shifting on autos and occasional limp-home behaviour

Maintenance is mostly about keeping the throttle body clean and the electronics happy. Under the bonnet, inspect the intake tube for cracks, make sure clamps are snug, and clean the throttle plate with throttle-safe cleaner (no aggressive scraping). After cleaning or any battery reset, perform Honda’s idle learn: warm the engine fully, turn all loads off (A/C, lights, demister), then let it idle undisturbed for about 5 minutes so the ECU relearns target airflow. A scan tool (HDS or quality aftermarket) helps verify TP Sensor A/B correlation.

On the 2010 Elysion, the TPS is integrated into the electronic throttle body and generally isn’t serviced separately. If the sensor pair fails tests or throws persistent TP correlation/voltage codes, the fix is usually a complete throttle body replacement. That job involves disconnecting the battery, removing the intake duct, unplugging the throttle actuator/TPS connector, detaching any coolant hoses if fitted, unbolting the body, fitting a new gasket, torquing evenly, reconnecting everything, clearing codes, and running the idle learn. Use quality parts, check for vacuum leaks, and road test over a few kilometres to confirm smooth response. It’s a straightforward spanner job for experienced DIYers, but many owners will prefer a trusted workshop for accurate diagnosis and ETCS resets.

Popular questions

Does the 2010 Honda Elysion actually have a throttle position sensor?
Yes. Honda’s PGM-FI/ETCS documentation for this era specifies dual throttle position sensors (TP Sensor A/B) inside the electronic throttle body. They work with the accelerator pedal sensor to manage throttle angle and provide redundancy for safety.

Can the TPS be replaced on its own, or does the whole throttle body need changing?
On most 2010 Elysion variants, the TPS is integrated and not sold separately by Honda. If the sensor fails or shows correlation faults, workshops typically replace the complete throttle body, then perform an idle learn and clear codes.

What are the common TPS-related fault codes on an Elysion?
You’ll often see codes like P0121–P0123 or P0221–P0223 for range/performance or circuit issues, plus mismatch/correlation faults between Sensor A and B. A good scan tool can show live TP percentages and confirm if the pair is tracking properly.