P2401 - OBD II Trouble Code

Our automotive experts have put together the following information about the P2401 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P2401 code.

What Does P2401 Code Mean?

OBD-II Code P2401 is defined as a Evaporative Emission System Leak Detection Pump Control Circuit

The Leak Detection Pump is part of the Evaporative Emissions System. After the vehicle has been sitting for a few hours, this pump will turn on and create a vacuum in the EVAP system. The engine computer (PCM) runs this test when the vehicle is off. If the PCM does not see the Leak Detection Pump activate as requested, or does not see a vacuum created in the EVAP System, the PCM will set code P2401.

Common Problems That Trigger the P2401 Code

• Evap leak detection pump failure
• Powertrain Control Module (PCM) failure
• Wiring issue