Parts for your 2023 Mazda 3-Throttle position sensors

2023 Mazda 3 throttle position sensor: what it is and how to look after it

Based on Mazda’s own service information for the BP-series Mazda 3 (2023) — including the Mazda Workshop Manual (ETC/Throttle Body sections), Mazda Global Service Support (MGSS) diagnostics, and the Mazda genuine parts catalogue — a throttle position sensor (TPS) is used on the 2023 Mazda 3. It’s built into the electronic throttle body as a dual-track position sensor, and works alongside the accelerator pedal position (APP) sensor. There isn’t a separate, bolt-on TPS like older cars had, on this model the sensor comes integrated with the throttle body assembly.

On a 2023 Mazda 3, the TPS tells the engine control module exactly how far the throttle plate is open. That lets the car meter fuel, spark and airflow smoothly, so it feels crisp underfoot and behaves properly at idle, cruise and full tilt. With modern drive‑by‑wire, the ECU cross-checks the TPS against the pedal’s APP sensor to keep things safe and tidy. Any mismatch can throw a fault and put the car into limp mode to protect the engine and drivetrain.

There’s no scheduled TPS replacement in normal servicing, and owners shouldn’t need to touch it. What pays off is keeping the intake system healthy. Under the bonnet, a light clean of the throttle body bore and plate (using throttle‑body‑safe cleaner) can help prevent sticky deposits that upset airflow and sensor readings. Don’t force the throttle plate open by hand, let the ECU drive it. If the battery’s been disconnected or the throttle body replaced, a throttle/idle learn procedure with a scan tool is the tidy way to reset targets.

Where there are drivability niggles — rough idle, hesitation, hunting revs, sudden loss of power, DSC or Check Engine lights — scanning for codes such as P0121, P0122, P0123, P2135 and related ETC/APP faults is the proper first step. Because the TPS is integral, fixes typically involve:

• Checking wiring/connectors for corrosion or damage
• Cleaning the throttle body if deposits are present
• Replacing the throttle body assembly (new gasket), then carrying out the electronic throttle relearn

Genuine or high‑quality OEM throttle bodies are recommended, and any software updates noted in Mazda service bulletins should be applied. With the right parts and a proper relearn, the Mazda 3’s throttle response returns to its smooth, eager best — ready for the next Kiwi or Aussie road trip.

Popular questions about 2023 Mazda 3 throttle position sensors

Does a 2023 Mazda 3 have a separate throttle position sensor I can replace?
It uses a TPS, but it’s integrated into the electronic throttle body. If the sensor fails, the usual remedy is to replace the throttle body assembly, then perform a throttle/idle learn with a scan tool.

What are the common symptoms of a dodgy TPS on a 2023 Mazda 3?
Owners might notice erratic idle, hesitation, surging, limp mode, poor fuel economy, and warning lights. A quick scan often reveals TPS/ETC codes like P0121–P0123 or P2135.

Can cleaning fix TPS-related faults on this model?
If the issue is minor airflow disturbance from deposits, a careful throttle body clean can help. True sensor faults usually require a new throttle body and a relearn procedure.