Parts for your 2013 Toyota Wish-Throttle position sensors

2013 Toyota Wish throttle position sensor (TPS): purpose, servicing and replacement

Based on Toyota’s service literature for the ZGE20/ZGE25-series Wish (2ZR-FAE/3ZR-FAE Valvematic engines) and the Electronic Throttle Control System-intelligent (ETCS-i) description in Toyota TIS repair manuals and EWDs, the 2013 Toyota Wish does use a throttle position sensor. It’s integrated into the electronic throttle body, providing dual feedback signals (often referenced as VTA1/VTA2). The presence of OBD-II DTCs P0120–P0124 and P0220–P0225 in Toyota diagnostic manuals for these engines further confirms a fitted TPS.

On a 2013 Toyota Wish, the TPS tells the engine control module exactly how far the throttle plate is open. Even though Valvematic adjusts valve lift to manage airflow, the throttle body and its built-in TPS remain vital for smooth starts, idle quality, cruise control behaviour, emissions control and limp-home redundancy. With ETCS-i, the ECM compares pedal position with TPS angle, commanding the throttle motor for crisp, predictable response. If the TPS lies or drops out, the Wish can feel doughy off the line, surge at idle, chew more petrol than it should, or light the MIL.

There isn’t a scheduled replacement interval for the TPS, it’s a monitor-and-maintain item. During routine servicing, a quick health check is smart:

• Scan for DTCs and review live data (Throttle Position vs Accelerator Pedal Position) in Techstream or a capable scan tool.
• Inspect the throttle body connector and wiring under the bonnet for moisture, corrosion or rubbed-through insulation.
• If the throttle bore is grimy, have the throttle body cleaned using the workshop procedure. Don’t force the plate by hand, the motor drive can be damaged. Use throttle-safe cleaner sparingly and replace the gasket if the unit is removed.

If the TPS fails, it’s typically replaced with the entire throttle body assembly, as Toyota integrates the sensors. After fitting, perform ETCS/throttle position learning with a scan tool so the ECM relearns the stop points and idle air values. In a pinch, an idle relearn (warm the engine and allow it to idle without loads for several minutes) may help, but proper initialisation is best. Use new gasket/seal, verify no vacuum leaks, and tighten mounting fasteners to the workshop manual torque (often in the 7–9 N·m range, model-specific).

Owners will notice the benefits straight away: steadier idle, better tip-in, cleaner shifts on the CVT under light throttle, and improved fuel economy over the next few kilometres. Keeping that TPS happy is a small effort that pays off every drive.

Popular questions about 2013 Toyota Wish throttle position sensors

Does the 2013 Toyota Wish have a separate TPS I can replace?
It uses an integrated TPS inside the electronic throttle body. Toyota’s repair manuals list the TPS signals and related DTCs, but the sensor isn’t serviced on its own. If it’s faulty, the usual fix is a complete throttle body replacement followed by an ETCS/throttle learn.

What symptoms point to a dodgy TPS on a 2013 Wish?
Common signs include erratic idle, a hesitant or flat spot on take-off, cruise control cutting out, higher fuel use and the check engine light. Scan tools often show codes like P0120–P0124 or mismatched throttle/pedal angles in the data list.

Can the TPS be calibrated without dealer tools?
Basic idle relearn can sometimes stabilise things after cleaning or battery disconnect, but the reliable method is using Techstream (or equivalent) to run ETCS initialisation and confirm the throttle position values. That way the ECM knows the exact closed and open positions.