Parts for your 2020 Toyota Vitz|yaris-Throttle position sensors

Throttle-position-sensors on the 2020 Toyota Vitz/Yaris

Yes, the 2020 Toyota Vitz/Yaris uses throttle-position-sensors. On this model (XP210 series), Toyota’s Electronic Throttle Control System – intelligent (ETCS‑i) integrates dual throttle position sensors inside the electronic throttle body, along with an electric throttle actuator. This isn’t an old-school, cable-and-standalone-sensor setup. Toyota’s technical literature for the 2020 Yaris (Repair Manual and New Car Features for MXPA10/MXPH10 platforms) specifies dual-track TPS signals (Sensor No.1 and No.2) used by the engine ECU to confirm blade angle and cross-check the accelerator pedal position sensor. Toyota’s Electronic Wiring Diagram also shows the TPS circuits built into the throttle body assembly. In parts catalogues, the sensor typically isn’t serviced separately, the throttle body assembly is replaced as a unit when the TPS is faulty.

On the 2020 Vitz/Yaris, the throttle-position-sensors constantly report the actual throttle plate angle. The ECU blends this with accelerator pedal input, engine load, and traction control requests to deliver smooth power, steady idle and emissions control. With two sensor tracks, the ECU can compare the signals for safety, if they deviate beyond tolerance, it will trigger a fault and likely drop the car into limp-home mode.

Servicing-wise, there’s no periodic replacement interval for the TPS on this model. The smart play is preventative care:

• Keep the air filter fresh and the intake sealed to prevent dust wearing the throttle shaft and sensors.
• Avoid spraying harsh cleaners directly into the electronic throttle body, if cleaning carbon, use a throttle-safe cleaner sparingly with the battery disconnected, and don’t force the blade by hand.
• After battery disconnection or throttle body replacement, allow the ECU to relearn idle. Many scan tools can run an ETCS-i calibration, otherwise a short drive cycle usually sorts it.

Suspect TPS issues if you notice a rough or high idle, hesitation, poor fuel economy, surging, or the MIL on with codes such as P0120–P0124 or P2135. A scan tool can graph TPS % and confirm dual-signal agreement. Because the TPS is integrated, confirmed faults generally mean replacing the throttle body assembly and performing the appropriate ECU calibration.

Technical sources referenced: Toyota Yaris (XP210) Repair Manual and New Car Features (ETCS‑i description and dual TPS logic), Toyota Electronic Wiring Diagram (TPS circuits internal to throttle body), Toyota parts catalogue listings showing the TPS as part of the throttle body assembly on 2020 Yaris/Vitz.

• Does the 2020 Vitz/Yaris have a throttle-position-sensor?
  Yes. It actually has two TPS tracks built into the electronic throttle body. The ECU uses both to verify the actual throttle angle for accurate, safe control.
• Can the TPS be replaced on its own?
  Not typically. On this model, the TPS is integrated with the throttle body and motor. If the sensor fails, the usual fix is replacing the complete throttle body assembly and carrying out an idle/throttle calibration.
• What are the warning signs of a failing TPS?
  Check-engine light, limp mode, erratic idle, hesitation, surge, or poor economy. Scan for codes like P0120–P0124 or P2135 and compare the two TPS signals on a graphing scan tool.