Parts for your 2009 Toyota Aurion-Throttle position sensors

2009 Toyota Aurion throttle position sensors (TPS): what they do and how to look after them

For the 2009 Toyota Aurion (GSV40 with the 2GR‑FE V6), throttle position sensing is absolutely used and relevant. Technical sources confirm it: Toyota’s ETCS‑i (Electronic Throttle Control System‑intelligent) design shown in the Toyota Repair Manual and the factory Wiring Diagram (EWD) lists two throttle position sensor circuits (VTA1 and VTA2) inside the electronic throttle body, plus a dual accelerator pedal position sensor on the pedal. The Toyota Electronic Parts Catalogue also shows the TPS as part of the throttle body assembly, not sold as a separate standalone sensor.

On this Aurion, the throttle plate is driven by an electric motor, and the ECU relies on the twin TPS tracks to know exactly where that plate is at any moment. Running two tracks provides redundancy and cross‑checks for safety. That accurate position feedback is crucial for smooth tip‑in, steady cruise, fuel economy and emissions control, and for limp‑home strategies if something goes pear‑shaped.

Because the TPS is integrated into the throttle body, maintenance is mostly about keeping the throttle bore clean and ensuring good electrical connections. As part of routine servicing, it’s sensible to inspect the intake ducting for cracks, clean the throttle bore and plate with throttle‑body‑safe cleaner (off the car or with care on the car), and avoid forcing the plate open by hand. Don’t drown the electronic side or the motor—light, careful cleaning is the go.

Replacement is generally only needed if there are confirmed faults like DTCs P0120–P0123, P0220–P0223, or P2135, or symptoms such as erratic idle, sudden limp mode, poor throttle response, or a consistently high idle after cleaning. Diagnosis should compare VTA1 and VTA2 signals and check the pedal sensors, wiring and earths before calling the throttle body. If the TPS tracks are faulty, the fix is to replace the throttle body assembly as a unit.

After throttle body replacement or a battery disconnect, the ECU will relearn. Usually it’s automatic after a few minutes of idling with all accessories off, then a short drive cycle, some workshops perform a scan‑tool idle learn for quicker results. Fresh gasket, correct torque on fasteners, and confirming there are no vacuum leaks will keep the Aurion happy. With clean airflow and good electrical integrity, these throttle bodies typically run for many years without drama.

• Key references: Toyota Repair Manual (2GR‑FE, ETCS‑i section), Toyota Aurion EWD (GSV40), and Toyota Electronic Parts Catalogue showing TPS integrated with throttle body assembly.

Popular questions

Does a 2009 Aurion have a separate, replaceable TPS?
No. On the 2009 Aurion, the throttle position sensors are built into the electronic throttle body. Toyota supplies the assembly with the motor and dual TPS together, so if the TPS tracks fail, the correct repair is to replace the throttle body unit.

What symptoms point to a failing TPS/throttle body on an Aurion?
Common signs include sudden limp mode, unstable or high idle, poor throttle response, and the check engine light with codes like P0120–P0123 or P2135. Before condemning the unit, it’s worth checking for intake leaks, a dirty throttle bore, and connector or wiring issues.

Do you need to calibrate the TPS after cleaning or replacing the throttle body?
After cleaning, no special calibration is usually needed—just let the car idle for a few minutes and take it for a short drive to let it relearn. After replacement, many workshops perform an idle relearn, and a scan‑tool routine can speed things up, but the ECU typically adapts on its own with proper procedures.