What does code P0120 mean?
The ECU detects a general fault in the TPS A sensor which measures throttle position
OBD-II Code
P0120 — Throttle Position Sensor or Switch A Circuit Malfunction
The ECU detects a general fault in the TPS A sensor which measures throttle position
Common symptoms
- Erratic acceleration
- loss of power
- hesitation
- unstable idle
Possible causes
- Damaged TPS
- loose connector
- broken wiring
- dirty throttle body
Initial recommendation
Inspect connector, clean throttle body, test TPS operation and replace if unresponsive.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0120 with your vehicle's actual symptoms for more complete diagnostic guidance.
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