Parts for your 2022 Mitsubishi Asx-Throttle position sensors

2022 Mitsubishi ASX throttle-position-sensor: what it does and how to look after it

Yes, the 2022 Mitsubishi ASX absolutely uses a throttle position sensor (TPS). In fact, it runs an electronic throttle body that houses twin throttle position sensors (main and sub) along with a throttle actuator motor. This arrangement is detailed in Mitsubishi Motors’ ASX/RVR/Outlander Sport service information (Engine Control/ETC sections) and reflected in the factory DTC set for throttle/pedal position faults (e.g., P0121–P0123, P2135). The Mitsubishi electronic parts catalogue also shows the throttle body supplied as an assembly with the sensors built in, rather than a separate, serviceable TPS.

On the 2.0-litre MIVEC petrol used in AU/NZ ASX models, the TPS tells the engine control unit (ECU) exactly where the throttle plate sits. The ECU blends this with the accelerator pedal position sensor (on the pedal) to manage fuel, spark, idle speed and load requests for the CVT and cruise control. That’s how the ASX achieves smooth take-offs, steady idle and crisp throttle response.

The TPS isn’t a routine replacement item. During regular servicing, it’s smarter to focus on keeping the throttle body clean and the wiring happy. A light clean of the throttle bore and plate with proper throttle body cleaner every 60,000–90,000 kilometres can prevent sticky operation. Don’t lever the plate open by hand, let the motor do its thing. Always check the connector for moisture, green crusties or damaged pins.

If faults do crop up, drivers may notice rough idle, hesitation, poor economy, cruise control dropping out, a check engine light, or limp mode. Common fault codes include P0121/P0122/P0123 (throttle/pedal position range/performance) or P2135 (throttle position sensor correlation).

On this model the TPS is integrated, so replacement typically means fitting a complete throttle body. Use a new gasket, torque the bolts correctly, and avoid aftermarket units of dubious quality—the ECU is fussy about signal plausibility. After refitting, perform a throttle/idle relearn with Mitsubishi’s MUT-III or a capable scan tool. If that’s not available, a warm-up and controlled idle procedure may work, but the scan tool method is more reliable. A battery voltage check and ECU software updates (where applicable) are sensible finishing touches.

Technical sources: Mitsubishi Motors ASX/RVR/Outlander Sport service manual (Engine Control/ETC), Mitsubishi OBD-II DTC documentation for throttle/pedal position circuits, and Mitsubishi electronic parts catalogue indicating the throttle body with integrated dual TP sensors.

• Signs of TPS/throttle body trouble: erratic idle, hesitation on tip-in, high idle, stalling, MIL on with P0121–P0123/P2135, limp mode.
• Good practice: clean throttle body, inspect loom and connector, perform idle relearn after cleaning or replacement.

Popular questions

Does the 2022 Mitsubishi ASX have a separate throttle position sensor?
It has two throttle position sensors built into the electronic throttle body, not a separate bolt-on sensor. There’s also an accelerator pedal position sensor on the pedal. The ECU cross-checks both sources for safety and accuracy.

Can the TPS be replaced on its own?
On this ASX, no. The TPS is part of the throttle body assembly. If the sensor tracks fail or go out of correlation, the fix is to replace the entire throttle body and then carry out a throttle/idle relearn with a suitable scan tool.

Is a relearn needed after cleaning or replacing the throttle body?
Yes—especially after replacement. A scan-tool-guided throttle/idle relearn (MUT-III or equivalent) is best. After cleaning only, a warm-up and steady idle procedure sometimes settles it, but a formal relearn helps prevent unstable idle and recurring fault codes.