Parts for your 2007 Lexus Is-Throttle position sensors

2007 Lexus IS throttle position sensor: what it does and how to look after it

According to Lexus factory repair literature for the 4GR‑FSE (IS250) and 2GR‑FSE (IS350) engines and the 2007 Electrical Wiring Diagram, the 2007 Lexus IS uses Electronic Throttle Control (ETCS‑i) with a throttle body that includes dual throttle position sensors (TPS), commonly labelled VTA1 and VTA2. The Engine Control Module compares these two signals to track throttle plate angle and verify plausibility. So yes—this model absolutely uses throttle position sensors, built into the throttle body assembly.

On this car, the TPS’s job is to tell the ECM exactly where the throttle plate sits. That data is blended with accelerator pedal position, engine speed and load to manage idle stability, throttle response and emissions. If the two TPS signals disagree, drift out of range, or go noisy, the ECM will put the car into limp mode to protect the engine and the driver.

Because the sensors are integrated, they’re not a separate bolt‑on part. If a TPS fails electrically, the fix is typically a complete throttle body replacement. Before going that far, it’s smart to check the basics: battery health and grounds, connector pins for corrosion, and the harness for damage. Many drivability gripes that feel like a “bad TPS” are actually dirty throttle plates. A careful clean of the throttle bore and blade with the correct cleaner often restores smooth idle and crisp response.

During routine servicing, it pays to:

• Inspect the throttle body for carbon build‑up and clean as needed.
• Scan for DTCs such as P0120–P0124 or P0220–P0223 and review live data for VTA1/VTA2 tracking.
• After cleaning or replacement, perform an idle/throttle relearn with a capable scan tool, some cases may relearn after a battery disconnect and an extended idle, but using a scan tool is more reliable.

When replacement is truly required, use a quality throttle body assembly and a new gasket, follow torque specs from the Lexus manual, and complete the throttle/idle relearn. A good repair restores smooth take‑off, steady idle and proper fuel economy—exactly how a well‑sorted 2007 Lexus IS should drive across Aussie or Kiwi kilometres.

Popular questions about 2007 Lexus IS throttle position sensors

Does a 2007 Lexus IS actually have a throttle position sensor?
Yes. The TPS is built into the electronic throttle body and uses two tracks (VTA1/VTA2) that the ECM cross‑checks. This is documented in Lexus service manuals and the 2007 IS250/IS350 Electrical Wiring Diagram.

Can the TPS be cleaned or does it need replacing?
The TPS itself isn’t serviceable separately. Cleaning the throttle plate and bore can resolve issues caused by carbon, but if the sensor circuit is faulty, the usual remedy is replacing the entire throttle body and then performing a relearn.

What are common signs or fault codes of a dodgy TPS on this model?
Frequent signs include erratic idle, hesitation, and limp mode. Typical codes are P0120–P0124 and P0220–P0223. Always verify with scan data to confirm VTA1 and VTA2 track smoothly and agree throughout the throttle range.