Parts for your 2013 Mazda 3-Throttle position sensors

2013 Mazda 3 throttle position sensor (TPS): what it does and when to service it

Yes, the 2013 Mazda 3 uses a throttle position sensor. Technical sources including the Mazda3 BL Workshop Manual (2010–2013) sections covering Electronic Throttle Control, and Mazda SKYACTIV-G service literature, state the throttle body is electronically actuated and incorporates dual throttle position sensors (often labelled TP1/TP2). The accelerator pedal also carries dual position sensors. That means the TPS is absolutely relevant on the 2013 Mazda 3, whether it’s the MZR 2.0/2.5 or the SKYACTIV-G 2.0.

On this model, the TPS is built into the throttle body, feeding live throttle angle data to the PCM so it can manage air, fuel, and spark with precision. Being drive-by-wire, the car relies on those twin TPS tracks for redundancy and safety. If readings don’t agree, the PCM can drop into limp mode to protect the engine and driver.

During servicing, the TPS itself isn’t a separate, serviceable item—it’s part of the throttle body assembly. What can be maintained is the cleanliness of the throttle bore and plate. Light carbon can cause touchy idle or a lazy throttle. A careful clean with throttle-body-safe cleaner (no soaking, no harsh scrubbing, and never forcing the plate by hand) can restore a smooth idle. If a TPS fault is confirmed (often with DTCs like P0121–P0123 or P2135), the fix is typically a new throttle body. After replacement, a throttle/idle learn with a scan tool is recommended so the PCM relearns the end stops and idle airflow.

• Common symptoms of TPS/throttle body issues:
  • Erratic idle, stalling, or surge at low speed
  • Flat spots, hesitation, or reduced power/limp mode
  • High fuel use and an illuminated check engine light
• Handy servicing tips:
  • Inspect the intake duct for cracks and ensure clamps are snug—false air can mimic TPS faults
  • Clean the throttle body every 30–50,000 kilometres if urban stop–start driving is common
  • Check connector pins and grounds before calling the throttle body—voltage drop can skew TPS data
  • Use a scan tool to view TP1/TP2 agreement and perform the idle/throttle learn after battery or throttle work

If the throttle body must come off, use a fresh gasket, torque fasteners correctly, and avoid touching the plate. A competent tech will confirm the fault with live data, rule out wiring issues, and do the relearn so the Mazda idles and drives sweet under the bonnet every time.

Popular questions about 2013 Mazda 3 throttle position sensors

Does a 2013 Mazda 3 have a throttle position sensor?
It does. The electronic throttle body includes dual TPS tracks, and the accelerator pedal has its own dual sensors. Both MZR and SKYACTIV-G engines use this setup. Faults usually log codes like P0121–P0123 or P2135 and may trigger limp mode.

How often should the TPS or throttle body be serviced?
The TPS isn’t a scheduled replacement item. Inspect the intake and clean the throttle body as needed—typically every 30–50,000 kilometres in Aussie and Kiwi city driving. Use throttle-body-safe cleaner and avoid forcing the plate. If a TPS track fails, replace the throttle body and carry out a learn procedure.

Can a bad TPS be driven on?
It’ll usually run, but it’s not wise. You can get hesitation, poor fuel economy, and limited power. Continued driving may worsen carbon build-up or leave the car stuck in limp mode at a bad time. Best bet: scan it, verify wiring and grounds, then fix it promptly.