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AutoCodes - Generic - P2401

P2401 Code - Evaporative Emission Leak Detection Pump Stuck OFF

- Code Popularity: 32,159 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P2401?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Canister Pump Module
  • Canister Pump Module harness is open or shorted
  • Canister Pump Module circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P2401?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2401 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2401 Description

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure. The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [726 to 750 mmHg(abs) (Typical value)] and saturated within a minute. If not, the ECM interprets this as a malfunction. The ECM illuminates the MIL and stores a Diagnostic Trouble Code (DTC) if this malfunction is detected in consecutive drive cycles. The Canister Pump Module is attached to the EVAP Canister and contains the Canister Pressure Sensor, the Leak Detection Pump, and the Vent Valve.
OBDII Code P2401 - Evaporative Emission Leak Detection Pump Stuck OFF - AutoCodes.com
P2401 Code - Evaporative Emission Leak Detection Pump Stuck OFF

Need More Information on the Code?

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Information for Specific Makes

  • P2401 BMW Evaporative Emission System Leak Detection Pump Control Circuit Low  
  • P2401 Dodge Evaporative Emission System Leak Detection Pump Control Circuit Low
  • P2401 Lexus Evaporative Emission Leak Detection Pump Stuck OFF  📷
  • P2401 Scion Evaporative Emission Leak Detection Pump Stuck OFF  📷
  • P2401 Toyota Evaporative Emission Leak Detection Pump Stuck OFF    📷
  • P2401 Volvo EVAP System Leak Detection Pump Control Circuit Low

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Code P2401 comments

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