P2401

The P2401 from Advanced Micro Devices is a control module designed for the EVAP System Leak Detection Pump, specifically addressing low voltage conditions in its control circuit. This component is crucial for the vehicle's evaporative emission control system.

Common symptoms indicating a P2401 issue include the illumination of the Check-Engine light, often shortly after a cold start or during refueling. The vehicle's onboard diagnostics may also report an EVAP-related readiness failure, which can prevent emission monitors from completing and potentially lead to a failed emissions test. In some instances, a faint gasoline odor may be detected near the fuel tank area, particularly when the system attempts to pressurize the charcoal canister but receives insufficient voltage.

Root causes for a P2401 code typically involve issues with the Powertrain Control Module (PCM) power or ground supply, faults within the pump's wiring harness, or an internal failure of the pump or module itself. Diagnosis often requires a scan tool to retrieve codes and freeze-frame data, followed by voltage checks on the pump circuit and PCM communication testing.

When repair is not feasible or reliable, a VIN-matched PCM replacement and proper reprogramming can restore EVAP compliance. Flagship One supplies ready-to-install modules with warranty coverage.