P0120 on Your 2024 Mitsubishi Eclipse Cross
Your 2024 Eclipse Cross has flagged P0120 — a throttle position sensor circuit malfunction. The 2024 model continues with the 1.5L turbocharged four-cylinder and CVT. The electronic throttle body integrates the TPS, and under Mitsubishi's warranty, the dealer handles this at no cost to you.
Symptoms
- Check engine light on
- Reduced engine power
- Throttle unresponsive or laggy
- Rough idle
- Possible S-AWC warnings
Probable Causes
1. Throttle Body Defect
Manufacturing defect in the electronic throttle body on a low-mileage vehicle.
2. ECM Software Calibration
Pending update for the 1.5T powertrain released after production.
3. Connector Issue
Assembly-related connector seating problem.
4. Turbo Proximity Heat
TPS wiring near the turbocharger developing insulation damage.
5. Pedal Sensor
Factory-defective pedal position sensor.
Diagnostic Steps
- Mitsubishi dealer scan
- TSB and update search
- Connector inspection
- Live TPS monitoring
- Freeze frame review
Repair Costs
- All repairs under warranty: $0
- Throttle body replacement (out of pocket): $225–$475
Can I Drive With P0120?
Not safely at highway speeds. Have it towed to a Mitsubishi dealer.
DIY vs Professional
Dealer only. The 2024 Eclipse Cross is under Mitsubishi's 5-year/60,000-mile basic warranty and 10-year/100,000-mile powertrain warranty.
Frequently Asked Questions
Is my 2024 Eclipse Cross under warranty?
Yes. Mitsubishi's 5-year/60,000-mile basic warranty covers all throttle components at no cost.
Is P0120 a serious code?
Yes. Throttle control is safety-critical. However, the reduced-power mode is the ECU protecting you. Get to the dealer for repair.
How long will the repair take?
Software updates are same-day. Throttle body replacement is typically 1-2 days.
Does Mitsubishi provide roadside assistance?
Yes. Mitsubishi includes 5-year/unlimited-mile roadside assistance with new vehicles. Call the number in your owner's manual for towing.