Parts for your 2011 Toyota Prius-Throttle position sensors

2011 Toyota Prius throttle position sensor (TPS): what it does and how to look after it

Technical references confirm the 2011 Toyota Prius does use a throttle position sensor. Toyota’s Repair Manual via the Technical Information System (TIS) describes the Electronic Throttle Control System–intelligent (ETCS‑i) on the 2ZR‑FXE engine, where the throttle body includes an integrated TPS and motor. Relevant factory DTCs include P0120–P0123 and P2135 for throttle/pedal position correlation, evidencing the sensor’s role. Toyota’s parts catalogue lists the “Throttle Body w/ Motor” assembly (commonly 22030‑37010 for this model), which incorporates the TPS rather than supplying it as a separate service item.

The Prius might be a hybrid, but it still breathes through a conventional throttle body. On the 2011 model, the throttle position sensor is built into the throttle body and constantly reports the throttle plate angle to the engine control module. Working alongside the accelerator pedal position sensors, it helps the ETCS‑i system blend driver demand with hybrid powertrain strategies for smooth, efficient drivability.

Because the TPS is integrated, if it fails the fix is typically to replace the complete throttle body assembly, then carry out the appropriate throttle/idle learn with a scan tool. There’s no separate TPS to swap over. That said, many “TPS problems” on these Priuses end up being a dirty throttle bore, a dodgy connector, or a wiring issue rather than a dead sensor.

What the owner or tech can do during routine servicing:

• Inspect the throttle body under the bonnet for carbon build‑up and gently clean the bore and plate with throttle‑safe cleaner. Avoid flooding the motor/shaft area.
• Check the electrical connector for corrosion, moisture, or a loose latch, ensure the harness isn’t chafed.
• Use a capable scan tool to view throttle angle and pedal position data, values should track smoothly with no jumps.
• After cleaning or replacing the throttle body, perform the throttle position/idle relearn as specified in the Toyota repair manual.

Common symptoms of TPS or throttle body issues on a 2011 Prius include a check engine light, hesitation, erratic idle, reduced power (limp mode), and codes like P0121 or P2135. If replacing the assembly, fit a new throttle body gasket, torque fasteners to spec, and verify hybrid system readiness before road testing. Using genuine or high‑quality parts and keeping the intake clean tends to prevent headaches and keeps the fuel economy on song across Aussie and Kiwi roads.

Popular questions about 2011 Toyota Prius throttle position sensors

Does a 2011 Prius actually have a TPS?
Yes. The throttle position sensor is integrated into the throttle body as part of the ETCS‑i system. Toyota’s factory diagnostics reference TPS‑related DTCs, which confirms its use on this model.

Can the TPS be replaced separately on a 2011 Prius?
No. The TPS isn’t a separate service part, it’s built into the throttle body with the motor. If the sensor fails, the standard repair is to replace the entire throttle body and carry out a relearn.

How often should the throttle body be cleaned?
There’s no strict interval, but checking/cleaning every 60,000–100,000 km is sensible, especially if idle quality drops or fuel economy worsens. Always use throttle‑safe cleaner and follow Toyota procedures.