Parts for your 2007 Toyota Corolla-Throttle position sensors

2007 Toyota Corolla throttle position sensors: what they do and how to look after them

Yes, the 2007 Toyota Corolla uses throttle position sensors. Toyota’s own technical literature backs this up: the New Car Features and Repair Manual on Toyota’s service information (TIS) describe Electronic Throttle Control (ETCS‑i) on the 1ZZ‑FE engine, which relies on twin throttle position sensors built into the throttle body, along with twin accelerator pedal position sensors at the pedal. The diagnostics section lists DTCs such as P0120–P0124 and P2135 for the throttle position (VTA) circuits, confirming the sensors’ presence. Independent data sets like Autodata and Haynes/Alldata echo the same system layout for the 2007 model year.

On this Corolla, the throttle position sensors aren’t a separate bolt‑on piece, they’re integrated into the electronic throttle body. Their job is to report the exact angle of the throttle plate to the engine control module, so fuelling, ignition timing and idle control line up with how the driver’s pressing the pedal. Because ETCS‑i is drive‑by‑wire, the ECU constantly cross‑checks the two TPS signals with the two pedal signals for safety and smooth response.

For servicing, there’s no routine replacement interval for the TPS. Instead, the focus is on inspection, cleaning and correct setup:

• Scan live data to confirm the two TPS tracks rise and fall smoothly and agree with each other. Any dropouts, dead spots or mismatch will usually trigger a MIL and codes like P0122, P0123 or P2135.
• Clean the throttle body and bore with throttle‑safe cleaner when there’s sticky idle, stalling or hunting. Don’t force the throttle plate open by hand on ETCS‑i.
• Check the connector and loom under the bonnet for corrosion or chafing—high under‑bonnet heat and vibrations can fatigue wiring over time, especially past 200,000 km.
• If the TPS is faulty, Toyota’s guidance is to replace the complete throttle body assembly, as the sensors are not serviceable separately. After refitting, perform the throttle/idle learning procedure with a scan tool so the ECU relearns the plate position.
• When the battery’s disconnected or the throttle body’s cleaned, be ready for a short relearn drive, idle may be uneven until the ECU adapts.

Typical symptoms of a crook TPS on this Corolla include hesitation, surging, erratic idle, poor fuel economy and an illuminated check‑engine light. Regular checks during scheduled servicing keep the throttle response crisp and help avoid roadside dramas.

Popular questions about 2007 Toyota Corolla throttle position sensors

Where is the throttle position sensor on a 2007 Corolla?

It’s built into the electronic throttle body that’s mounted on the intake manifold. Unlike older cable setups, it isn’t a separate, adjustable sensor. The accelerator pedal has its own position sensors, but those aren’t the throttle position sensors.

Can the TPS be replaced on its own, or does the whole throttle body need changing?

For the 2007 Corolla with ETCS‑i, Toyota specifies replacing the entire throttle body if a TPS fault is confirmed. The sensors are integrated and calibrated at the factory. After replacement, a throttle/idle relearn with a scan tool is recommended.

How often should the TPS be serviced?

There’s no set interval to replace it. As part of regular servicing, clean the throttle body, inspect the connector and wiring, and check TPS data on a scan tool—especially if there are drivability concerns or fault codes.