What does code P0123 mean?
High voltage detected from TPS A; the ECU interprets excessive throttle opening.
OBD-II Code
P0123 — Throttle Position Sensor or Switch A Circuit High Input
High voltage detected from TPS A; the ECU interprets excessive throttle opening.
Common symptoms
- Sudden acceleration
- hesitation
- unstable idle
Possible causes
- Signal wire shorted to voltage
- faulty TPS
- loose connector
Initial recommendation
Check wiring, secure connector, test TPS operation.
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 P0123 with your vehicle's actual symptoms for more complete diagnostic guidance.
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