Parts for your 2015 Toyota Vitz|yaris-Throttle position sensors

2015 Toyota Vitz/Yaris Throttle Position Sensor (TPS)

Yes, the 2015 Toyota Vitz/Yaris does use a throttle position sensor. Toyota’s service information for the 1KR‑FE, 1NR‑FE and 1NZ‑FE engines shows an ETCS‑i (electronic throttle control) setup where the TPS is built into the throttle body assembly, along with the throttle actuator motor. It works alongside the accelerator pedal position sensor on the pedal. On this model, the TPS isn’t usually a separate, adjustable part — it’s part of the throttle body.

The TPS tells the engine control module the exact angle of the throttle plate, so the car can manage torque, idle speed, emissions and cruise control smoothly. It gives fast, accurate feedback and includes redundancy for safety, which is why the car can drop into limp mode if the signal doesn’t stack up with the pedal sensors. That design is documented across Toyota ETCS‑i wiring diagrams and repair manuals for this generation.

Thinking about servicing? There’s no set replacement interval for the TPS on a 2015 Vitz/Yaris. It’s “inspect and clean” rather than “replace on schedule”. Typical signs of trouble include:

• Check Engine Light with codes like P0120–P0124 or P2135
• Limp mode, sluggish response, hunting idle or stalling at lights
• Poor fuel economy or odd shifting behaviour on automatics

Good maintenance starts with a clean throttle body. With the key off, remove the intake hose and use throttle‑body‑safe cleaner on a cloth to wipe carbon from the bore and plate edge. Don’t force the butterfly open and don’t flood the sensor area. After cleaning, an idle relearn or throttle initialisation may be needed — a quick drive cycle often does it, though a scan tool reset is best.

If the TPS signal is genuinely faulty, the fix on this model is typically a complete throttle body replacement. Use a new gasket, torque the fasteners correctly, and perform the throttle/idle relearn with a scan tool. Before condemning the unit, check the connector and loom for corrosion or broken wires, and make sure battery voltage and grounds are healthy — low voltage can mimic sensor faults.

As a rule of thumb, inspect the throttle body and air intake every 20,000–30,000 kilometres, or sooner if the car does lots of short trips, dusty roads, or city stop‑start work. It keeps the TPS feedback clean and the Vitz/Yaris feeling crisp on the throttle.

Popular questions about 2015‑Toyota‑Vitz‑Yaris throttle‑position‑sensors

Does the 2015 Vitz/Yaris have both a TPS and a pedal sensor?
Yes. It has an accelerator pedal position sensor on the pedal and a throttle position sensor built into the throttle body. The ECU cross‑checks both for safety and smooth control. On this model the TPS isn’t usually serviced separately from the throttle body.

Can the TPS be cleaned or reset on a 2015 Yaris?
The TPS itself is sealed, so you can’t clean the sensor internals. You can clean the throttle body to remove carbon that affects readings, then perform an idle relearn or throttle initialisation with a scan tool. If the sensor tracks are faulty, replacement of the throttle body is the go.

What fault codes point to a bad TPS on this model?
Common codes include P0120–P0124 (TPS circuit range/performance) and P2135 (throttle/pedal correlation). Before replacing parts, check wiring, connectors, battery health and throttle body cleanliness — those often sort the grief without big spend.