Parts for your 2005 Honda Elysion-Throttle position sensors

2005 Honda Elysion throttle position sensor: what it is and how to look after it

Yes, the 2005 Honda Elysion is fitted with a throttle position sensor (TPS). Honda’s own technical literature — including the Elysion RR1–RR4 PGM‑FI/Electronic Throttle Control System section of the workshop manual, Honda ServiceNews coverage of K24A/J30A drive‑by‑wire, and parts catalogues listing the throttle body assembly with integrated dual TPS tracks — confirms the Elysion uses an electronic throttle body with built‑in, redundant TPS sensors.

On this model, the throttle position sensors tell the ECU exactly how far the throttle plate is open. Working alongside the accelerator pedal position sensor, MAP/MAF and oxygen sensors, the TPS helps the ECU manage fuel delivery, ignition timing and idle speed. Because it’s a drive‑by‑wire setup, the TPS isn’t a separate little switch on the side like older cable‑throttle Hondas — it’s part of the throttle body assembly and uses two sensor circuits for safety. If either track disagrees with the other, the ECU flags a fault and may drop into limp mode to protect the engine and occupants.

• Common signs of TPS trouble: hesitant take‑off, surging cruise, unstable idle, poor fuel economy, and the MIL on with codes such as P0121/P0122/P0123 or correlation faults like P2135.
• No scheduled replacement, but it benefits from periodic inspection during servicing, especially if driving in dusty or humid conditions common across Aus and NZ.

Servicing tips for a 2005 Elysion’s throttle‑position sensors:

1. Scan first. Use a scan tool to check live data for TPS A/B agreement and smooth percentage change from closed to wide‑open. Any dead spots or jumpy readings point to internal wear or connection issues.
2. Inspect and clean. With the battery disconnected, check the throttle body connector for corrosion or moisture, and ensure the engine and body earths are clean and tight. A contact cleaner on the plug can sort intermittent faults.
3. If the TPS is faulty, replace the throttle body assembly. On this Elysion the TPS isn’t serviced separately. Fit a new gasket, torque to spec per the Honda manual, and clear codes.
4. Carry out an idle learn/ETCS reset. Warm the engine to operating temp, switch off all loads (A/C, lights), then let it idle undisturbed for about 5 minutes, or use a scan tool’s throttle/idle relearn function. This helps the ECU relearn throttle angles.

Practical timing: have the throttle body inspected and cleaned around 100–150,000 kilometres or when symptoms appear. Quality fuel and a clean air filter help keep sensor readings stable. If in doubt, get it diagnosed properly — guessing with electronic throttle parts can be costly.

Popular questions about 2005 Honda Elysion throttle‑position sensors

Does the 2005 Elysion have a separate TPS I can replace?
The 2005 Elysion’s TPS is integrated into the electronic throttle body and uses dual sensor tracks. Honda does not specify a separate TPS replacement, the correct repair is to replace the throttle body assembly, then perform an idle/throttle learn.

What fault codes indicate a bad TPS on this model?
Typical codes include P0121 (range/performance), P0122 (low input), P0123 (high input) and correlation faults like P2135 (TPS A/B mismatch). You may also see throttle actuator protection codes and limp‑home behaviour. Always verify with live data before replacing parts.

Can cleaning fix TPS issues?
Cleaning the throttle plate and connector can resolve minor sticking or contact corrosion, which sometimes mimics TPS faults. However, if the internal sensor tracks are worn or the ECU sees persistent correlation errors, cleaning won’t cure it — the throttle body will need replacement.