Parts for your 2018 Mitsubishi Eclipse cross-Throttle position sensors

2018 Mitsubishi Eclipse Cross throttle-position-sensors — what they do and when to service them

Yes, the 2018 Mitsubishi Eclipse Cross uses throttle-position-sensors. Technical references including the Mitsubishi Motors Service Manual for the Eclipse Cross (GK, 4B40 engine) and factory OBD-II diagnostics confirm an electronic throttle control system with dual throttle position sensors built into the throttle body, along with accelerator pedal position sensors. Common manufacturer DTCs like P0121, P0122, P0123 and P2135 listed for this model further verify that the vehicle is fitted with throttle-position-sensors.

On this Eclipse Cross, the throttle-position-sensors monitor how far the throttle plate has opened and report that position to the engine control module. That lets the ECU juggle fuel, spark and boost for smooth response and decent economy. Because it’s a drive-by-wire setup, Mitsubishi uses two TPS signals for redundancy and safety, so the car can catch a dodgy reading before it becomes a drama.

In normal servicing, the throttle-position-sensors aren’t a routine “replace at X kilometres” item. They’re part of the throttle body assembly and are designed to be maintenance-free. What does help is keeping the throttle body clean and ensuring the wiring and connectors under the bonnet are tidy and corrosion-free. If the sensors go out of range or disagree with each other, the car may chuck a check-engine light or jump into limp mode.

• Common signs to watch for:
  • Hesitation, surging, or rough idle
  • Sluggish throttle response or limp-home behaviour
  • Check-engine light with TPS/ETC codes (e.g., P0121–P0123, P2135)

• Care and replacement tips for 2018-mitsubishi-eclipse-cross throttle-position-sensors:
  • No forced movement: don’t twist the throttle plate by hand, it can damage the actuator and sensors.
  • Gentle cleaning: if cleaning carbon, use throttle-safe cleaner sparingly and avoid flooding the electronics.
  • Check the loom: inspect the harness for rub-through near the throttle body and at the pedal.
  • Relearn required: after throttle body replacement or a thorough clean, perform the factory throttle/idle relearn with a scan tool, a battery pull isn’t a reliable reset.
  • Genuine-spec parts: the TPS is integrated, so replacement generally means a complete throttle body. Use OEM-spec for correct calibration.
  • Professional diagnosis: before grabbing the spanners, confirm with live data that the fault isn’t a vacuum leak or pedal sensor mismatch.

Popular questions about 2018-mitsubishi-eclipse-cross throttle-position-sensors

Does this model actually have a separate TPS I can swap?
It’s not a separate plug-in sensor on this vehicle. The Eclipse Cross integrates dual throttle-position-sensors inside the electronic throttle body. If one fails, the usual fix is replacing the throttle body assembly and carrying out a relearn.

How often should the TPS be serviced?
There’s no set interval. Instead, keep the throttle body reasonably clean every 60,000–100,000 kilometres and inspect connectors. If drivability issues or TPS-related fault codes appear, test first, then replace the throttle body if confirmed faulty.

Is it safe to drive with a failing TPS?
Short trips might be possible, but it can drop into limp mode, stall, or surge. Best bet is to get it scanned and sorted promptly to avoid getting stranded or causing extra wear.