Parts for your 2023 Mitsubishi Asx-Throttle position sensors

2023 Mitsubishi ASX throttle position sensors — what’s fitted and how to look after them

For the 2023 Mitsubishi ASX sold in Australia and New Zealand, a throttle position sensor (TPS) is absolutely relevant and used. Technical references including the Mitsubishi Motors ASX/RVR/Outlander Sport workshop manual (2019–2023, Engine Electrical – Electronic Throttle Control) and the Mitsubishi ASA/EPC parts catalogue confirm the model uses electronic throttle control with dual throttle-position sensing integrated into the throttle body. The factory documentation also lists diagnostic trouble codes such as P0121–P0123 and P2135 that specifically monitor TPS performance, reinforcing that the sensor is present and monitored. On this model, the TPS is built into the throttle body and is not serviced as a separate bolt-on part.

On the 2023 ASX, the TPS tracks the angle of the throttle plate and feeds that signal to the engine control module. That data is used for fuelling, ignition timing, idle control and the CVT’s shift logic, and it also supports cruise control and stability systems. The assembly uses two sensor tracks for redundancy, so the ECU can cross-check them for accuracy. It works alongside the accelerator pedal position sensor, giving the car smooth, predictable throttle response under all conditions.

There’s no scheduled replacement interval for the TPS because it’s solid-state and sealed inside the throttle body. In normal servicing, the smart move is to keep the intake clean and the air filter fresh, and have the throttle body inspected and cleaned if idle is unstable or there’s a sticky pedal feel. If the throttle body is cleaned, avoid forcing the plate by hand and use the correct cleaner, many workshops will run a throttle/idle relearn with a scan tool afterwards. Always check connectors and earths under the bonnet if a warning light pops up.

If the TPS does fail, the fix on this ASX is to replace the complete throttle body assembly. It’s wise to confirm with live data and any stored DTCs (think P0121–P0123, P2135) before ordering parts. During replacement, fit a new gasket, don’t overtighten fasteners, and perform the throttle learn procedure so idle and take-off feel are spot on. Because wiring faults can mimic a bad sensor, a proper diagnostic once-over saves time and coin.

• Common TPS-related symptoms: rough or high idle, hesitation, poor fuel economy, limp-home mode, or a Check Engine light.
• Good practice: periodic throttle body inspection/clean, scan for codes, and idle relearn after battery disconnects or cleaning.

Does the 2023 Mitsubishi ASX have a separate, replaceable TPS?
It has throttle-position sensing, but it’s integrated into the throttle body. If the sensor fails, the throttle body assembly is replaced as a unit.

How often should the TPS/throttle body be serviced?
There’s no fixed interval for the TPS itself. Many workshops check and, if needed, clean the throttle body around every 30,000–60,000 km or when drivability symptoms appear.

Can a home mechanic handle throttle body replacement and relearn?
With care, yes—however a scan tool makes the throttle/idle relearn quicker and more reliable. If unsure, a qualified technician can sort it promptly.