Parts for your 2005 Toyota Kluger-Throttle position sensors

2005 Toyota Kluger throttle position sensor: what it is and how to look after it

Yes, the 2005 Toyota Kluger uses a throttle position sensor (TPS). Technical documentation confirms it’s part of Toyota’s ETCS‑i (Electronic Throttle Control System – intelligent) on both 2AZ‑FE (2.4L) and 3MZ‑FE (3.3L) engines. The Toyota Repair Manual for Kluger/Highlander (Engine Control – ETCS‑i sections), the Toyota Electrical Wiring Diagram (showing ECM inputs VTA1/VTA2 from the throttle position sensor and VPA1/VPA2 from the accelerator pedal position sensor), and the Toyota Electronic Parts Catalogue (listing the throttle body assembly with integral TPS, not sold separately) all point to a dual‑track TPS built into the electronic throttle body. Related DTCs include P0120–P0124, P0222/P0223 and P2135 noted in Toyota service literature.

The TPS on a 2005 Kluger tells the engine computer exactly where the throttle plate is at any moment. Alongside the accelerator pedal position sensor at the pedal, it lets the ECM compare “requested” throttle (your right foot) with “actual” throttle (butterfly angle) to deliver smooth power, good fuel economy, stable idle and the right shift timing. It’s also key to safety strategies, if the two signals don’t agree, the ECM can drop into limp mode to protect the engine and driveline.

Because it’s an ETCS‑i setup, the TPS is integrated into the throttle body and is non‑adjustable. In most cases, if the TPS is faulty, the proper fix is to replace the complete throttle body assembly. That’s why routine servicing focuses on keeping the throttle body clean and the wiring healthy rather than fiddling with sensor adjustments.

• Common symptoms: erratic idle, flat spots, harsh shifts, cruise control dropping out, poor economy, and the MIL with codes like P0121/P2135. Under the bonnet, a failing TPS may not look obvious, so scan data is king.
• Basic checks: inspect the connector and loom for corrosion or broken wires, especially near the throttle body. Use a scan tool to watch VTA1/VTA2 signals, they should rise smoothly and track each other without drop‑outs.
• Cleaning: at around 60,000–100,000 kilometres, a careful throttle body clean can help idle quality. Use proper throttle‑body cleaner, don’t drown the electronics, and don’t force the butterfly by hand.
• Replacement tips: use a quality (preferably OEM) throttle body with a new gasket. After installation, perform the throttle/idle learn with a capable scan tool as specified in Toyota service procedures. Battery disconnect “relearns” are hit‑and‑miss, the correct initialisation avoids hunting idle and stalling.
• What not to do: there’s no mechanical adjustment screw for TPS on this model—don’t try to set it by ear, and avoid piercing wires for tests.

Treated well, the Kluger’s TPS and throttle body combo are reliable. When faults do crop up, a quick code read and a look at live data usually saves time and guesswork.

Popular questions

Can the TPS be replaced separately on a 2005 Kluger?
On most 2005 Kluger engines, the TPS is built into the throttle body and isn’t sold separately by Toyota. Some aftermarket options claim separate sensors, but Toyota’s service guidance is to replace the complete throttle body when the TPS is faulty, then carry out the proper throttle learn.

Where is the TPS located on a 2005 Kluger?
It’s part of the electronic throttle body on the intake manifold, with a multi‑pin connector. There’s also a separate accelerator pedal position sensor at the pedal, the ECM compares both to keep throttle control safe and smooth.

What are the signs of a bad TPS and how is it tested?
Drivers may notice surging, dead spots on take‑off, rough idle, or the vehicle dropping into limp mode. A scan tool will often reveal codes like P0121 or P2135. Technicians check live data for smooth, matching VTA1/VTA2 traces and will wiggle‑test the harness, any drop‑outs or mismatches point to a failing sensor or wiring.