Code Definition

P0124 — Throttle/Pedal Position Sensor/Switch A Circuit Intermittent

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0124

P0124 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0124 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0124 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0124 fault code is activated when the Engine Control Module (ECM) identifies intermittent signal input from the Throttle Position Sensor (TPS) or Accelerator Pedal Position (APP) Sensor in the 'A' circuit. This intermittent signal can be due to poor connections, damaged wires, or a faulty sensor. It indicates that the signal from the sensor is sporadically dropping out or fluctuating beyond the expected range, causing uncertainty in throttle or pedal position readings. The ECM monitors this condition and sets the code when the intermittent criteria are detected during engine operation.

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