FixVault

DTC P2401: EVAP System Leak Detection Pump Control Circuit Low

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DTC P2401 Detection Condition & Possible Causes Chart
G01345469Courtesy of MAZDA MOTORS CORP.

Diagnostic Procedure 

Fig 2: DTC P2401 Diagnostic Procedure Chart (Step 1-8)
G01345470Courtesy of MAZDA MOTORS CORP.
Fig 3: DTC P2401 Diagnostic Procedure Chart (Step 9-10)
G01345471Courtesy of MAZDA MOTORS CORP.