Parts for your 2015 Toyota Land cruiser-Throttle position sensors

2015 Toyota Land Cruiser throttle-position-sensors (TPS)

For the 2015 Toyota Land Cruiser (J200 series), a throttle position sensor is absolutely used and relevant. Toyota’s Electronic Throttle Control System – intelligent (ETCS‑i) integrates dual throttle position sensors inside the throttle body. This design is documented in Toyota Repair Manual sections for the 200 Series (Engine Control – ETCS‑i/Throttle Body with Motor and TPS), the Toyota Electrical Wiring Diagram showing VTA1/VTA2 TPS signals to the ECM, and diagnostic coverage for TPS-related DTCs such as P0120–P0124 and P2135. Both the 3UR‑FE petrol V8 and the 1VD‑FTV V8 diesel use this arrangement.

The throttle position sensors tell the engine computer exactly where the throttle plate sits, so it can manage torque, fuelling, ignition timing, transmission shift strategy, cruise control and stability systems. On the 2015 Land Cruiser, there are two TPS tracks built into the throttle body that the ECM cross‑checks against each other and against the accelerator pedal position sensor. That redundancy keeps things safe and smooth, especially when towing or heading off‑road.

As part of servicing, the TPS isn’t a separate adjustable part—it’s factory‑set within the throttle body assembly. If a sensor track goes out of range or the correlation isn’t right, the ECM will usually flag a code and may drop the vehicle into limp mode to protect the drivetrain. Typical symptoms include erratic idle, flat spots on acceleration, harsh or delayed kickdown, and the MIL showing with codes like P0121 or P2135.

Good workshop practice is to inspect the throttle body and connector under the bonnet for contamination or damaged wiring, especially after water crossings or engine bay cleaning. A careful throttle body clean can help sticky throttle plates, but don’t soak the electronic side or blast the connector—keep cleaners away from the sensor housing and seals.

If diagnosis points to a failed TPS, the remedy is replacement of the throttle body assembly with the correct Toyota part. After fitting, a throttle/idle learn or ETCS reset is required using a scan tool (or the manufacturer’s specified key‑on procedure) so the ECM relearns the new sensor’s baseline. Clear codes, check live data for smooth, linear VTA1/VTA2 increases, and verify no correlation faults on a road test.

• Watch for DTCs: P0120–P0124, P2135, plus related throttle actuator codes.
• Keep battery voltage healthy—low voltage can trigger ETCS faults.
• Avoid pressure‑washing the throttle body or connectors.
• Use OEM‑quality parts, cheap sensors can cause recurring faults.
• Log throttle data during services if drivability complaints are noted.

Where is the throttle position sensor on a 2015 Land Cruiser?

It’s built into the throttle body on the intake, not on the accelerator pedal. The unit contains two TPS circuits and the throttle actuator motor, all monitored by the ECM. The pedal has its own separate position sensor.

Can the TPS be cleaned or adjusted?

There’s no separate adjustment—the TPS is calibrated at the factory. You can clean the throttle bore carefully, but if the TPS itself is faulty, the fix is replacing the throttle body assembly, then carrying out an ETCS/throttle learn procedure.

What fault codes point to a TPS issue on this model?

Common codes include P0120, P0121, P0122, P0123 and P2135 (sensor circuit and correlation). You may also see throttle actuator codes like P2101 or P2118. Proper diagnosis should confirm wiring integrity and check that TPS signals (VTA1/VTA2) rise smoothly with throttle angle.