Parts for your 2019 Toyota Camry-Throttle position sensors

2019 Toyota Camry throttle-position-sensors: what they do and when to service them

Based on Toyota’s own service literature for the XV70 Camry (ETCS‑i system description in the Repair Manual and Electronic Parts Catalogue), a throttle-position-sensor is absolutely used on the 2019 Toyota Camry. It’s built into the “throttle with motor” assembly on the 2.5‑litre and 3.5‑litre petrol engines, and works alongside the accelerator pedal position sensor. Toyota treats the sensor as part of the throttle body, not a separate bolt‑on item. Relevant Toyota diagnostics include DTCs such as P0120–P0124 and P2135, which specifically monitor throttle-position-sensor performance and correlation.

On this Camry, the throttle-position-sensor tells the engine computer exactly how far the throttle plate is open. In an electronic throttle (ETCS‑i), there’s no traditional cable, the ECU compares the pedal sensors with the throttle-position-sensor and commands an electric motor to move the plate. That’s how it keeps idle smooth, delivers crisp response, and manages traction and cruise control. If the signals don’t stack up, the car can drop into limp mode to protect the engine and driveline.

There’s no routine, standalone “throttle-position-sensor service” in the maintenance schedule. Instead, good practice is to keep the throttle body clean and electrically healthy. If you’re cleaning a gummed‑up throttle, use approved throttle cleaner sparingly and avoid drowning the electronics. If the sensor itself fails or shows erratic data, the cure is typically a new throttle body assembly. After replacement, Toyota specifies an ETCS reset/idle learn with a scan tool so the ECU relearns the new component’s baseline. Skipping that step can leave the idle high or hunting.

Owners and workshops should watch for tell‑tales that point at throttle-position-sensor or throttle body issues:

• Check Engine lamp, often with traction control lights
• Poor throttle response, stalling at lights, or a fixed high/low idle
• Limp-home behaviour and stored DTCs like P0120–P0124 or P2135

If any of the above show up, a scan‑tool live‑data check is the go. Look for smooth, linear throttle angle change and proper agreement between pedal position and throttle angle. Intermittent spikes or mismatched tracks mean it’s time to test wiring and, if needed, fit a new throttle body. With quality parts and correct initialisation, the Camry’s throttle-position-sensor setup is generally fit‑and‑forget for well over 150,000 km.

• Does the 2019 Camry have a separate throttle-position-sensor I can replace?
  No. On this model it’s integrated into the throttle body (throttle with motor assembly). If the sensor fails, the usual fix is replacing the complete unit and performing an ETCS reset/idle learn.
• What symptoms point to a failing throttle-position-sensor on a 2019 Camry?
  Warning lights (Check Engine, TRAC), lazy or jumpy throttle response, odd idle, and codes like P0120–P0124 or P2135. Live data that isn’t smooth or doesn’t match pedal input is a giveaway.
• Can I clean the throttle-position-sensor to fix issues?
  You can carefully clean throttle plate deposits, which can help idle quality, but you can’t open or service the integrated sensor. If sensor tracking is faulty, replacement of the throttle body is the reliable remedy.