Parts for your 2013 Toyota Vitz|yaris-Throttle position sensors

2013 Toyota Vitz/Yaris Throttle Position Sensor (TPS)

Yes, the 2013 Toyota Vitz/Yaris uses a throttle position sensor. Toyota’s own service literature for the XP130 series (ETCS‑i in the SFI/Engine Control section of the Toyota Repair Manual), the 2013 Yaris/Vitz Electrical Wiring Diagram, and Toyota DTC coverage (P0120–P0124, P2135 for throttle/pedal position circuits) all describe dual-signal throttle position sensing built into the “Throttle Body with Motor” assembly, along with an accelerator pedal position sensor at the pedal. The TPS isn’t a separate bolt‑on switch like older cars, it’s integrated into the electronic throttle body and read by the ECM via the VTA/VTA2 tracks.

On the 2013 Vitz/Yaris, the throttle position sensor works hand‑in‑hand with the electronic throttle motor. It tells the engine control module exactly where the throttle blade is, so the car can meter fuel, spark and idle speed smoothly. It also helps the auto transmission pick the right gear and keeps emissions in check. Because it’s a drive‑by‑wire setup, the car relies on accurate TPS feedback for safety and limp‑home strategies, which is why Toyota uses dual redundant signals.

There’s no routine replacement interval for the TPS on this model. As part of regular servicing, it’s smart to check the throttle body connector and harness for corrosion or chafing, especially if the car sees a lot of wet weather or coastal air. If the idle’s a bit rough or the car hesitates off the line, a careful throttle body clean with a product safe for coated throttles can help. Don’t flood the sensor area and don’t force the throttle plate by hand, let the motor move it. After cleaning or battery disconnection, an idle relearn may be needed—most scan tools can command a throttle/idle learn, or the car will relearn after a short mixed drive.

Common warning signs of TPS trouble include the check engine light, limp mode, erratic idle, flat spots on acceleration and poor fuel economy. Fault codes like P0120, P0122, P0123 or P2135 point you straight to the throttle/pedal position circuits. Because the TPS is integrated, repairs usually mean replacing the entire throttle body assembly rather than the sensor alone. Use a new gasket, torque the mounting bolts correctly, and perform a throttle/idle learn with a capable scan tool so it settles into a stable idle. Before committing to parts, rule out wiring or connector issues—they’re frequent culprits and far cheaper to fix.

If replacement is needed, quality OEM or reputable aftermarket throttle bodies fit up cleanly and typically take about an hour for a workshop to sort. With good servicing habits—clean air filter, periodic throttle body inspection, and prompt attention to any DTCs—the TPS and throttle body on a 2013 Vitz/Yaris generally give long, drama‑free service across Aussie and Kiwi conditions.

Popular questions about 2013 Toyota Vitz/Yaris throttle position sensors

Does a 2013 Vitz/Yaris actually have a throttle position sensor?
Yes. It’s part of the electronic throttle body (ETCS‑i) and provides dual position signals to the engine computer. There’s also a separate accelerator pedal position sensor at the pedal. Toyota’s repair info and DTCs (P0120–P0124, P2135) confirm it’s fitted to XP130 models.

Can the TPS be replaced on its own, or is the whole throttle body needed?
On this model the TPS is integrated, so the standard repair is to replace the throttle body assembly. That avoids calibration and sealing issues. After installation, a throttle/idle relearn with a scan tool is recommended for a stable idle.

What symptoms point to a bad TPS on a 2013 Vitz/Yaris?
Look for a check engine light, sudden limp mode, uneven idle, hesitation on take‑off, and worse fuel use. Scan for codes—P0120, P0122, P0123 or P2135 often appear. Always check the connector and wiring before swapping parts.