Code Definition

P0414 — Secondary Air Injection System Switching Valve A Circuit Shorted

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

About P0414

P0414 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 P0414 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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 P0414 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 ECM/PCM sets this code when it detects a short circuit in the control wiring for Secondary Air Injection (SAI) Switching Valve A. This valve controls airflow into the exhaust system to reduce emissions. A shorted circuit can cause improper valve operation, leading to incorrect air injection.

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