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Parts for your 2011 Toyota Wish-Throttle position sensors
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2011 Toyota Wish throttle position sensor (TPS): what it does and how to look after it
Yes, the 2011 Toyota Wish uses a throttle position sensor. Technical literature for the ZR-series engines fitted to the Wish (Toyota New Car Features for ETCS‑i, and the Toyota Repair Manual for ZGE2# models) confirms the vehicle runs Electronic Throttle Control (ETCS‑i). In this setup, the throttle body contains a throttle control motor and dual throttle position sensors that report throttle plate angle to the engine ECU. It’s integrated into the throttle body assembly rather than a separate, bolt‑on TPS. Toyota parts catalogues and fault code definitions (e.g., P0120–P0124, P0220, P2135) for these models further support that the TPS is present and monitored.
On the 2011 Toyota Wish, the TPS tells the ECU exactly how far the throttle plate is opened. Paired with the accelerator pedal position sensors, it lets the ECU balance air, fuel and ignition for smooth take‑off, steady cruising and clean emissions. Because it’s part of the electronic throttle body, there’s no scheduled replacement interval for the TPS itself, it’s replaced with the throttle body if it fails.
Signs the TPS/throttle body is unhappy can include lazy acceleration, hunting idle, stalling when coming to a stop, cruise control dropping out, or the check engine light with relevant DTCs. Before swapping parts, good workshops in Aus/NZ will scan live data for the two TPS tracks (they should agree), inspect the connector and wiring, and check for intake leaks that can mimic sensor faults.
Servicing tips for a long life:
- Keep the throttle body clean. A light clean every 40–60,000 kilometres with approved throttle body cleaner can help stabilise idle. Don’t soak it and don’t force the throttle plate by hand.
- If the throttle body is removed, fit a new gasket, reconnect carefully, and torque to the workshop manual spec. Avoid pinching or straining the harness.
- After cleaning or replacement, perform an ETCS/throttle relearn with a scan tool (or the ECU “reset memory” procedure where appropriate) so idle and tip‑in feel return to normal.
- If replacing: order the complete throttle body assembly specified for the Wish’s engine variant. The TPS is not designed to be serviced separately.
Done right, a healthy TPS and throttle body keep the Wish feeling perky around town and relaxed on the open road, with fuel economy that stays on point.
Popular questions
How do you know the TPS is failing on a 2011 Toyota Wish?
Common clues include erratic idle, hesitation off the line, surging at steady speeds, and a check engine light. A scan will often show TPS‑related DTCs (such as P0120 series) or mismatched readings between the two TPS tracks. It’s smart to rule out vacuum leaks and a dirty throttle first.
Can the TPS be replaced separately from the throttle body?
On the 2011 Wish with ETCS‑i, the TPS is built into the throttle body and isn’t serviced as a stand‑alone sensor. If the TPS is faulty, the recommended fix is to replace the complete throttle body assembly and carry out a throttle relearn.
Do you need a relearn after cleaning or replacement?
Yes. After cleaning the throttle body or fitting a new one, a throttle/idle relearn helps the ECU recalibrate the throttle angle to airflow. Using a scan tool’s ETCS or idle learning function gives the best results and avoids rough idle or stalling.
