Code Definition

P0223 — Throttle / Pedal Position Sensor / Switch B Circuit High Input

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

About P0223

P0223 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 P0223 is stored, the module has detected a signal or supply voltage higher than the expected operating range; and 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 P0223 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

Sensor B is the redundant partner to sensor A in an electronic throttle control system, supplied with a 5V reference and returning a signal the ECM compares against A to validate driver demand. On many designs sensor B sweeps inversely to A, sitting at its highest voltage with the pedal released and falling as the pedal is depressed, so the expected value at any given position must be taken from specification rather than assumed. P0223 sets when the ECM measures sensor B signal voltage above its maximum acceptable threshold for a calibrated period, commonly above about 4.8V, exceeding what the...

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