Parts for your 2019 Mitsubishi Eclipse cross-Throttle position sensors

2019 Mitsubishi Eclipse Cross Throttle Position Sensors

Throttle-position sensors are absolutely relevant and used on the 2019 Mitsubishi Eclipse Cross. Technical references that confirm this include: the Mitsubishi Motors Eclipse Cross (GK/GL) workshop/service manual sections on the Electronic Throttle Control (ETC), which outline a drive-by-wire throttle body containing dual throttle-position sensors, the factory OBD-II diagnostic list for this model that includes P0121, P0122, P0123 and related throttle-position circuit codes, and OEM parts catalogues for the 1.5L turbo MIVEC (4B40) showing the electronic throttle body assembly with integrated throttle-position sensing. Many procedures also note the need for throttle/idle relearn via MUT-III or equivalent after throttle body service—another marker that the TPS is integral to engine management on this vehicle.

On the 2019 Eclipse Cross, the throttle-position sensor (TPS) tells the engine computer exactly how far the throttle blade is open. With the model’s electronic, drive-by-wire setup, the ECU constantly compares the TPS signals inside the throttle body with the accelerator pedal’s position sensors to deliver smooth throttle response, manage fuel and spark, keep the turbo happy, and coordinate systems like cruise control, CVT shift strategy, and stability control. If the readings don’t stack up, the ECU will protect the drivetrain by trimming power or dropping into limp mode.

There’s no scheduled replacement interval for the TPS because it’s built into the throttle body and designed to last the distance. As part of routine servicing, it’s smart to visually check the throttle body connector and loom for corrosion, chafing, or loose pins, and to keep the intake plumbing sealed so dust and moisture don’t creep in. If the throttle plate gets gummy, a careful clean with proper throttle-body cleaner (key off, no drowning the electronics) can help stabilise idle and response. After deeper cleaning or replacement, the system may need an idle/throttle relearn using a capable scan tool (MUT-III or equivalent) so the ECU knows the new baseline positions. If the TPS fails, the fix on this model generally means replacing the complete throttle body assembly and fitting a new gasket. Use quality parts, avoid twisting the harness under the bonnet, clear any DTCs, perform the relearn, and confirm with a road test. Catching early hints—like a sporadic check engine light or a jumpy idle—can save headaches and keep fuel economy and drivability on point for Kiwi and Aussie roads.

• Check engine light with throttle codes
• Surging, flat spots, or limp mode
• Unstable idle or stalling at lights
• Poor fuel economy and response
• Harsh or odd CVT shift behaviour

FAQ: 2019 Mitsubishi Eclipse Cross Throttle Position Sensors

Where is the throttle-position sensor on a 2019 Eclipse Cross?
It’s integrated into the electronic throttle body on the intake side of the engine. The accelerator pedal also has its own position sensors. There isn’t a separate, serviceable external TPS—if the sensor fails, the throttle body assembly is typically replaced.

What are common symptoms of a failing TPS on this model?
Drivers may notice a check engine light, hesitant take-off, surging, a rough or hunting idle, poor fuel economy, or the vehicle dropping into limp mode. Scan tools will often show codes like P0121–P0123 related to the throttle-position circuit or performance.

Does TPS or throttle body replacement require programming?
Yes—after cleaning heavily or replacing the throttle body, an idle/throttle relearn with a suitable scan tool (MUT-III or equivalent) is recommended. This helps the ECU re-learn exact throttle plate positions. Simply disconnecting the battery usually won’t complete the adaptation properly.