Code Definition

P0227 — Throttle/Pedal Position Sensor/Switch C Circuit Low Input

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

About P0227

P0227 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 P0227 is stored, the module has detected a signal or supply voltage lower 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 P0227 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 P0227 fault code is set when the Engine Control Module (ECM) detects a lower than expected input signal from the Throttle Position Sensor (TPS) or Pedal Position Sensor (PPS) in the 'C' circuit. This sensor is crucial in providing data about the position of the throttle or accelerator pedal, enabling the ECM to adjust the air-fuel mixture and engine power. A low input signal in this circuit can indicate an electrical problem, such as a short to ground, a malfunctioning sensor, or issues with the wiring or connectors. This condition can lead to problems such as erratic throttle response, re...

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