Parts for your 2017 Mitsubishi Lancer-Throttle position sensors

2017 Mitsubishi Lancer throttle position sensors (TPS): what they do and how to look after them

Yes, the 2017 Mitsubishi Lancer is fitted with a throttle position sensor — in fact, dual TPS tracks integrated into the electronic throttle body. Technical sources confirming this include the Mitsubishi Motors service manual for Lancer (Electronic Throttle Control System section, Group 13A/Engine), Mitsubishi’s diagnostic literature covering TPS-related DTCs (P0120–P0123, P2135), and the Mitsubishi ASA parts catalogue, which lists the throttle body assembly for 4B11/4B12 engines with built-in sensors and actuator. So a TPS is absolutely relevant on the 2017 Lancer.

The TPS tells the engine computer exactly how far the throttle plate is open. On the 2017 Lancer’s drive‑by‑wire setup, it works hand‑in‑hand with the accelerator pedal position sensor. Together, they manage airflow, fuel delivery, spark timing and idle stability. When the TPS reports clean, accurate data, the car feels crisp off the line, holds a steady idle, and shifts smoothly in autos. If it goes out of spec, expect rough running, flat spots, poor fuel economy and, at times, limp‑home behaviour with the MIL on.

There’s no scheduled replacement for the TPS on this model, it’s a monitor-and-maintain item. Because the sensor is integrated into the throttle body, most genuine repairs involve replacing the complete throttle body assembly rather than the sensor alone. Many workshops in Australia and New Zealand follow this approach per OEM guidance, then carry out an idle/throttle relearn using a scan tool after installation.

• Tell‑tale symptoms: erratic idle, hesitation, cruise control drop‑out, high fuel use, and codes like P0120–P0123 or P2135.
• Basic care: keep the throttle body clean with proper throttle‑body cleaner (not carb sprays that can attack coatings), and inspect the connector and harness for corrosion or chafing under the bonnet.
• Diagnostics: confirm issues with live data and DTCs rather than guessing. Voltage tracking on both TPS circuits should be smooth with no dead spots.
• Replacement tips: choose quality OEM‑equivalent parts, fit a new gasket, check for intake leaks, and complete a relearn so idle and tip‑in feel are right from the first kilometre.

Looked after properly, the Lancer’s TPS and throttle body run for many years. Adding a quick connector check and throttle cleanliness check to regular servicing helps keep the 4B11/4B12 engines feeling lively and economical on Kiwi and Aussie roads.

Does the 2017 Lancer have a separate TPS or is it built into the throttle body?

It’s built into the electronic throttle body, with dual sensor tracks for redundancy. The pedal has its own position sensor, and the ECU cross‑checks both. This integrated design improves reliability and safety in modern drive‑by‑wire systems.

Can the TPS be replaced on its own on a 2017 Lancer?

Typically, no. OEM practice is to replace the complete throttle body assembly because the TPS is sealed inside. Some aftermarket options claim separate sensors, but fitment and calibration can be hit‑and‑miss. After replacement, a throttle/idle relearn via scan tool is standard workshop procedure.

What fault codes point to a TPS issue on a 2017 Lancer?

Common codes include P0120–P0123 (TPS circuit range/performance, low/high input) and P2135 (correlation between dual throttle sensors). If these appear with symptoms like hesitation or unstable idle, proper diagnosis with live data under varying throttle angles is the smart next step.