Code Definition

P0229 — Throttle/Pedal Position Sensor/Switch C Circuit Intermittent

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

About P0229

P0229 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 P0229 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 P0229 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 P0229 fault code is set when the Engine Control Module (ECM) detects intermittent readings or signal disruptions from the Throttle Position Sensor (TPS) or Pedal Position Sensor (PPS) in the 'C' circuit. This sensor is integral in providing accurate information about the position of the throttle or accelerator pedal, which the ECM uses to control the air-fuel mixture and engine power output. Intermittent issues with the sensor or its circuit can lead to problems such as unpredictable throttle response, engine stalling, or irregular idling. Causes of these intermittent signals can include l...

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