Parts for your 2020 Mitsubishi Eclipse cross-Throttle position sensors

2020 Mitsubishi Eclipse Cross throttle position sensors

Yes, the 2020 Mitsubishi Eclipse Cross uses throttle position sensors. Technical documentation for the 4B40 1.5‑litre turbo (MIVEC) shows an electronic throttle control (drive‑by‑wire) setup with dual throttle valve position sensors integrated into the throttle body. This is reflected in Mitsubishi Motors service manual sections for Engine/EFI – Throttle Body and in factory wiring diagrams, as well as the vehicle’s supported OBD‑II diagnostics for TPS‑related DTCs (e.g., P0121–P0123, P2135). So, the Eclipse Cross absolutely relies on TPS data for smooth running.

On this model, the TPS pair tells the engine control module exactly how far the throttle plate is open, so it can match fuel, ignition timing, turbo boost control, idle speed and torque requests. It also feeds into cruise control, stability systems and air‑con idle‑up logic. Because it’s an electronic throttle, the TPS is built into the throttle body with the throttle motor—there isn’t a separate cable‑type sensor.

There’s no routine replacement interval for the throttle position sensors. As they’re part of the throttle body assembly, service is usually about inspection and cleanliness. During regular servicing, a technician will typically:

• Scan for fault codes and live data to confirm the sensors track smoothly and agree (the “main” and “sub” signals should correlate).
• Inspect the throttle body connector and loom for corrosion, moisture ingress or chafing.
• Clean the throttle bore and plate with throttle‑safe cleaner applied to a cloth (not flooded into the housing), taking care not to force the plate or contaminate the sensor cavity.

If faults appear—think Check Engine Light, limp mode, surging or a stubborn idle—the usual suspects include code sets like P0121, P0122, P0123, P0221 or P2135. Before condemning the unit, it’s smart to check battery health, grounds and the connector pins. When replacement is needed, the throttle body (including the TPS) is swapped as a single unit. Use a new gasket, torque the fasteners evenly, and disconnect the battery during the job.

After cleaning or replacement, a throttle/idle relearn or adaptation is recommended. This can occur automatically after a short key‑on cycle and gentle drive, but using a capable scan tool speeds the process and ensures stable idle. Genuine or quality OEM‑equivalent parts are the go, especially given the TPS is mission‑critical to drivability and fuel economy.

Common signs the Eclipse Cross TPS/throttle body needs attention:

• Intermittent or high idle, hesitation on take‑off, or uneven acceleration
• Reduced power mode (limp), poor fuel use, or cruise control drop‑outs
• Check Engine Light with TPS‑related fault codes

Service tips:

• Don’t manually force the throttle plate—use the pedal or scan tool actuations.
• Avoid harsh solvents, use throttle‑body‑safe cleaner only.
• Perform an idle/throttle relearn after cleaning, battery change or replacement.

FAQs

Does the 2020 Mitsubishi Eclipse Cross actually have a throttle position sensor?
It does. The Eclipse Cross uses an electronic throttle body with two built‑in throttle position sensors that track the throttle plate. Even though it’s drive‑by‑wire, the ECU still needs TPS signals to control fuel, spark and torque accurately.

Can the TPS be replaced on its own, or is it part of the throttle body?
On this model it’s part of the throttle body assembly and isn’t serviced separately. If the TPS fails diagnostic tests, the standard repair is to replace the complete electronic throttle body and carry out an adaptation/relearn.

After a battery change the idle’s a bit off—does the TPS need calibration?
There’s no separate TPS calibration, but the throttle/idle strategy may need to relearn. Let the vehicle idle after key‑on, then take a short drive with gentle throttle inputs, or use a scan tool to perform a throttle/idle relearn so the ECU resets its targets.