Parts for your 2006 Toyota Aurion-Throttle position sensors

2006 Toyota Aurion throttle position sensors (TPS)

Technical sources including the Toyota Aurion (GSV40) Repair Manual for the 2GR-FE engine (ETCS-i section) and the 2006 Aurion Electrical Wiring Diagram confirm the car does use throttle position sensing. It’s built into the throttle body with motor assembly, not a separate bolt-on sensor. Toyota labels the dual internal sensors as VTA1 and VTA2, and related diagnostic codes include P0120–P0124 and P0220–P0229. So, a throttle position sensor is absolutely relevant on a 2006 Toyota Aurion—it's just integrated into the electronic throttle body rather than being a standalone unit.

On the Aurion, the throttle position sensors tell the engine ECU exactly how far the throttle plate is opened. That info is critical for fuelling, ignition timing, emissions control and smooth shifting on the auto. With Toyota’s ETCS‑i setup, there are two TPS tracks for redundancy, so the ECU can cross-check signals for safety and accuracy. When everything’s in tune, the Aurion feels crisp off the line, idles neatly, and the gearbox behaves nicely in traffic and on the open road.

Because the TPS is built into the throttle body, there’s no separate sensor to replace. If diagnostics point to a failed TPS circuit and wiring checks come up clean, the fix is typically to replace the entire throttle body with motor assembly. That sounds big, but it also resets wear on the throttle shaft and motor.

• Common signs of TPS trouble: erratic idle, hesitation, surging, harsh or awkward shifts, reduced power/limp mode, and a check engine light with codes like P0120–P0124 or P0220–P0229.
• Good servicing practice: clean the throttle body bore and plate periodically (every 60,000–100,000 km, or sooner if it idles rough). Use throttle-body-safe cleaner and avoid drowning the motor/sensor side.
• Always inspect the connector and loom near the throttle body. Heat and vibration can fatigue wiring or spread pins.
• After throttle body replacement or a thorough clean, perform an idle/throttle relearn. Many shops use Toyota Techstream, a basic relearn can also occur after key-on/idle cycles and normal driving.
• Rule out accelerator pedal position sensor faults first, since the Aurion uses both pedal and throttle sensors to agree with each other.

When fitting a new throttle body, use a fresh gasket, torque evenly, and check for vacuum leaks afterwards. A road test and a final scan to confirm no pending codes round out the job nicely.

Popular questions about 2006 Toyota Aurion throttle-position-sensors

Does a 2006 Toyota Aurion actually have a throttle position sensor?
The 2006 Aurion does, but it’s part of the electronic throttle body rather than a standalone, cable-era sensor. Toyota’s manual lists two internal TPS circuits (VTA1/VTA2) used by the ECU for precise throttle control and safety checks.

Can the TPS be replaced separately on a 2006 Aurion?
No. If the integrated TPS fails and wiring checks are fine, the proper repair is replacing the complete throttle body with motor assembly. That restores the TPS, throttle motor, and shaft in one go, and then a relearn is carried out.

What fault codes point to a TPS problem on the Aurion?
Common ones include P0120–P0124 (Throttle/Pedal Position Sensor “A”) and P0220–P0229 (“B” circuit) range/performance, high/low, or intermittent faults. Techs will also check for related ETCS‑i codes and confirm with live data for VTA1/VTA2 along with loom integrity.