Parts for your 2010 Mazda Axela-Throttle position sensors

2010 Mazda Axela throttle position sensors

Based on technical references including the Mazda3 (BL) Workshop Manual for 2010 (Throttle Body/ETC sections), Mazda Global Service Support (MGSS), and trade data platforms such as Autodata and ALLDATA, the 2010 Mazda Axela (BL-series Mazda3) is equipped with an electronic throttle body that contains dual throttle position sensors (TPS) integrated into the throttle body assembly. It’s a throttle-by-wire setup: there’s no separate, old-school stand-alone TPS on the side of a cable throttle. The TPS units are non-serviceable on their own, if they fail, the usual repair is replacement of the throttle body assembly. Typical related DTCs include P0121–P0123 and correlation faults such as P2135.

On this Axela, the TPS reports the exact angle of the throttle plate to the PCM so fuelling, ignition timing, and emissions controls stay on song. The throttle body carries two TPS signals for redundancy and plausibility checks, working alongside the accelerator pedal position (APP) sensor. That’s how the car delivers smooth response under the right foot while keeping idle stable and fuel economy tidy around town.

As part of routine servicing, the TPS itself isn’t a scheduled replacement item, but good habits go a long way. Keep the throttle bore clean with appropriate throttle-body cleaner (don’t flood the shaft area), and never force the throttle plate open by hand with the battery connected. If the check-engine light pops on with throttle-related codes, check the harness and connector first for corrosion or a loose fit under the bonnet. On high-kilometre cars, heat and vibration can fatigue wiring near the throttle body.

If a TPS fault is confirmed, the remedy on a 2010 Axela is generally a complete throttle body replacement. Use quality parts, fit a new gasket where required, and ensure intake hose clamps are snug and air-tight. After installation, a throttle/idle learn must be performed—best done with a scan tool following the Mazda procedure noted in the BL workshop manual. Without the relearn, idle may hunt or the car may drop into limp mode. A quick road test and live-data check (TP1/TP2 agreement, no stored DTCs) rounds out the job.

• Common symptoms: erratic idle, surging, flat spots, poor take-off, harsh shifts (auto), reduced power/limp mode, and a glowing check-engine light with codes like P0121–P0123/P2135.

FAQs

Does the 2010 Mazda Axela have a separate TPS?
It doesn’t. The TPS is built into the electronic throttle body as dual sensors. If the TPS fails, the usual fix is replacing the throttle body assembly rather than a stand-alone sensor.

How is the throttle relearned after replacing the throttle body?
Use a capable scan tool and follow the Mazda BL workshop procedure to perform an idle/throttle learn. This lets the PCM store the new throttle plate positions. Skipping this step can leave the idle unstable or trigger limp mode.

Will cleaning the throttle body fix TPS faults?
Cleaning can help sticky throttle plates and mild idle issues, but it won’t repair an internal TPS fault. If codes for TPS circuit or correlation return after cleaning and wiring checks, the throttle body likely needs replacement.