Code Definition

P041F — Secondary air injection control valve Circuit low Circuit A

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

About P041F

P041F 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 P041F is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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 P041F 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 P041F fault code is set when the Engine Control Module (ECM) detects a lower than expected voltage in the circuit of the secondary air injection control valve, specifically in Circuit A. This low voltage condition indicates an issue in the electrical system related to the control valve of the secondary air injection system. The secondary air injection system is designed to introduce additional air into the exhaust system, aiding in the reduction of emissions. A low voltage in the control valve circuit can lead to improper operation of the secondary air injection system, potentially affecti...

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