P0120

Warning

Throttle Position Sensor/Switch A Circuit Malfunction

Severity
Warning
Category
Powertrain
Code Type
Generic OBD-II
Applicable Regions
US, EU, Global

Is it safe to drive?

🟡 Check the vehicle display for drive or charge restrictions and schedule service promptly.

What does P0120 mean?

Fault code P0120 means "Throttle Position Sensor/Switch A Circuit Malfunction". It is a standard OBD-II diagnostic trouble code (DTC) in the powertrain system, classified as "powertrain" with a severity level of "warning". This code indicates a condition that should be addressed soon. Schedule a diagnostic appointment within the next few days to prevent further damage. This code is defined by the SAE J2012 / ISO 15031.

Possible Causes

  • Sensor failure or signal out of range
  • Wiring harness damage or loose connection
  • Control module software issue
  • Vacuum leak or air intake restriction

Recommended Actions

  1. 1 Schedule service as soon as possible
  2. 2 Check and replace the affected sensor if confirmed faulty
  3. 3 Inspect wiring and connectors for damage

Related Powertrain fault codes

P0100 Mass or Volume Air Flow Circuit Malfunction P0102 Mass or Volume Air Flow Circuit Low Input P0103 Mass or Volume Air Flow Circuit High Input P0105 Manifold Absolute Pressure/Barometric Pressure Circuit P0107 Manifold Absolute Pressure/Barometric Pressure Circuit P0108 Manifold Absolute Pressure/Barometric Pressure Circuit P0110 IAT Circuit Malfunction P0117 Engine Coolant Temperature Circuit Low Input