Parts for your 2006 Toyota Blade-Throttle position sensors

2006 Toyota Blade throttle position sensor: what it does and how to look after it

Based on Toyota service literature (Toyota Repair Manual for Blade AZE154H/GRE156H, 2006, Engine Control – ETCS‑i) and Denso electronic throttle documentation used on the 2AZ‑FE and 2GR‑FE engines, the 2006 Toyota Blade does use a throttle position sensor. It’s integrated into the electronic throttle body as dual, redundant tracks (often referenced as VTA/VTA2) that report actual throttle plate angle to the engine control module. This isn’t the same as the accelerator pedal position sensor at the pedal, both are fitted and work together in Toyota’s drive‑by‑wire system.

On this Blade, the throttle position sensor (TPS) helps the ECU nail smooth take‑off, crisp throttle response and stable idle, while managing emissions and fuel economy. When the driver presses the pedal, the ECU checks the pedal sensors, commands the throttle motor, then verifies plate movement with the TPS. If readings don’t match, it pulls power and lights the MIL to keep things safe.

Common signs the TPS/throttle body needs attention include:

• Erratic idle, stalling when coming to a stop, or a lazy throttle feel
• Surging at steady speed or hesitation on tip‑in
• Check‑engine light with codes such as P0120–P0124, P0220–P0223, or throttle actuator range/performance faults

Servicing is straightforward but should be done with care. The TPS on most Denso throttle bodies for this model is integral and typically not serviced separately, workshops usually replace the complete throttle body if the sensor tracks are faulty. Before replacing parts, a tech will scan live data (VTA/VTA2 agreement, TP% smoothness), check the connector and loom under the bonnet for corrosion or chafing, and verify a clean, stable 5 V reference and earth.

If the throttle plate has carbon build‑up, a careful clean with throttle‑body‑safe cleaner can restore smooth operation. Don’t force the plate by hand on an electronic unit. After cleaning or any battery disconnect, an idle relearn may be required, factory procedures cover this under ETCS‑i initialisation. Always use a new gasket if the body is removed, and tighten fasteners to the factory spec from the Toyota manual.

As part of regular servicing in Australia and New Zealand conditions, it’s smart to: keep the air filter fresh, ensure the PCV system isn’t feeding excess oil mist, inspect the throttle body every 40–60,000 km for deposits, and address any stored throttle‑related codes promptly. Quality parts and proper scan‑tool checks go a long way to keeping the Blade running sweet.

Popular questions about 2006 Toyota Blade throttle position sensors

Does the 2006 Toyota Blade have a separate TPS, or is it built into the throttle body?
It’s built into the throttle body as a dual‑track sensor on ETCS‑i systems. The car also has an accelerator pedal position sensor at the pedal. Both are required for safe, precise drive‑by‑wire control.

What are typical symptoms or fault codes of a failing TPS on a Blade?
Drivers may notice erratic idle, flat spots, or limp‑home behaviour. Common codes include P0120–P0124 or P0220–P0223, and sometimes throttle actuator range/performance faults if the ECU sees mismatch between commanded and actual plate angle.

Can the TPS be cleaned, or does it need replacement?
The sensor itself isn’t really cleanable. If the issue is carbon on the throttle plate, cleaning the throttle body can help. If the sensor tracks are worn or readings are inconsistent, the fix is typically replacing the complete throttle body assembly, followed by an idle relearn.