Parts for your 2015 Mitsubishi Lancer-Throttle position sensors

2015 Mitsubishi Lancer Throttle Position Sensor (TPS)

Based on Mitsubishi’s factory service information for the CJ/CF Lancer (2008–2017), the 2015 Mitsubishi Lancer does use a throttle position sensor. It’s built into the electronic throttle body as part of the drive-by-wire system, paired with an accelerator pedal position (APP) sensor. This arrangement is also shown in the Mitsubishi ASA electronic parts catalogue and described in the Haynes Mitsubishi Lancer 2007–2017 workshop manual. So yes, the TPS is relevant on a 2015 Lancer—though it’s typically not a separate bolt-on sensor like older cable-throttle setups.

On a 2015 Lancer, the TPS tells the engine computer exactly how far the throttle plate is open. Working alongside the APP sensor at the pedal, it helps the ECU deliver the right fuel and spark for smooth take-offs, crisp response and decent fuel economy. The system uses redundancy (two TPS tracks inside the throttle body) for safety, if the readings don’t agree, the ECU can drop the car into limp mode to protect the engine and driver.

When the TPS or its wiring plays up, the car may feel flat, surge, idle roughly, or chew more fuel. The check engine light might pop up with codes like P0121–P0123 or P2135. Before throwing parts at it, it’s smart to scan it, check live data, and inspect the connector and loom near the throttle body—they can cop heat and vibration under the bonnet.

Servicing-wise, the TPS itself isn’t a separate service item—it’s integral to the throttle body. What does help is keeping the throttle bore clean. Carbon around the throttle plate can upset idle control and make the ECU chase its tail. Use a proper throttle-body cleaner with the battery off, don’t force the plate. After any clean or battery disconnect, an idle/throttle relearn may be needed. A scan tool makes this quick, but a careful warm-up and stable idle period can also do the trick on many cars.

If the TPS has failed, replacement usually means fitting a new or quality remanufactured throttle body and a fresh gasket. It’s a straightforward spanner job—air duct off, connector out, bolts off—though space can be tight. Once fitted, perform a throttle/idle learn and clear codes. If there’s any doubt, a workshop with Mitsubishi-capable diagnostics (MUT-III or equivalent) can test the TPS tracks, verify the fix and save guesswork.

Does the 2015 Lancer have a separate TPS I can change?

No—on this model the TPS is built into the electronic throttle body. There are dual TPS tracks inside the housing, and the accelerator pedal has its own dual sensors as well. If the TPS is faulty, the usual repair is to replace the throttle body assembly.

Can cleaning fix TPS issues on a 2015 Lancer?

Cleaning won’t repair a failed TPS, but it can sort drivability problems caused by carbon build-up around the throttle plate. Use throttle-body cleaner, avoid forcing the plate, then complete a throttle/idle relearn. If codes return (like P0121–P0123), further diagnosis of the sensor and wiring is needed.

What fault codes point to TPS trouble on these cars?

Common codes include P0121, P0122, P0123 and P2135. They don’t always mean the sensor is dead—poor connections, damaged wiring or a low battery can trigger them too. A proper scan with live data, connector checks and voltage tests helps decide whether it needs a throttle body or just a repair to the loom/plug.