AutoCodes – Toyota – P2401 2005 Toyota Prius

P2401 2005 Toyota Prius Code - EVAP System Leak Detection Pump Control Circuit Low

Quick Answer

5 hours after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. Common causes include Faulty Vacuum Pump Module, Vacuum Pump Module harness is open or shorted, Vacuum Pump Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2401 2005 Toyota Prius indicates EVAP System Leak Detection Pump Control Circuit Low.
Common causes: Common causes include Faulty Vacuum Pump Module, Vacuum Pump Module harness is open or shorted, Vacuum Pump Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,662

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2401 2005 Toyota Prius Description

5 hours after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure.

OBDII Code P2401 2005 Toyota Prius - EVAP System Leak Detection Pump Control Circuit Low - AutoCodes.com — P2401 2005 Toyota Prius Code - EVAP System Leak Detection Pump Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2401 2005 Toyota Prius?

Faulty Vacuum Pump Module
Vacuum Pump Module harness is open or shorted
Vacuum Pump Module circuit poor electrical connection
EVAP system hose (clogged, cracked or broken)
Faulty Engine Control Module (ECM)

How to Fix the DTC P2401 2005 Toyota Prius?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2401 2005 Toyota Prius code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2401 2005 Toyota Prius code?

Need more information on how to fix the P2401 2005 Toyota Prius code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2401 2005 Toyota Prius Code

1. What does OBDII code P2401 on a 2005 Toyota Prius mean?

This code indicates a problem with the EVAP system Leak Detection Pump Control Circuit being detected as lower than normal.

2. What are common symptoms of OBDII code P2401 in a 2005 Toyota Prius?

Common symptoms include the check engine light illuminating, poor fuel efficiency, and potential issues with emissions testing.

3. What are possible causes of OBDII code P2401 in a 2005 Toyota Prius?

Potential causes include a faulty Leak Detection Pump, damaged wiring or connectors in the circuit, or a problem with the EVAP system pressure sensor.

4. How can I diagnose the cause of OBDII code P2401 in my 2005 Toyota Prius?

Diagnosis typically involves checking the wiring and connectors for damage, testing the Leak Detection Pump and pressure sensor, and verifying proper operation of the EVAP system components.

5. Can I continue driving my 2005 Toyota Prius with OBDII code P2401?

While the vehicle may still be operable, it is recommended to address the issue promptly to prevent further damage and ensure proper emissions control.

6. How can I repair OBDII code P2401 in my 2005 Toyota Prius?

Repair options may include replacing the Leak Detection Pump, repairing damaged wiring or connectors, or addressing any issues with the EVAP system pressure sensor.

7. Will resetting the check engine light resolve OBDII code P2401 in my 2005 Toyota Prius?

Simply clearing the code may temporarily turn off the check engine light, but the underlying issue causing the code will likely trigger the light to come back on if not properly addressed.

8. Can a DIY enthusiast fix OBDII code P2401 in a 2005 Toyota Prius?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this issue. However, it is recommended to consult a professional if unsure.

9. Is OBDII code P2401 a serious problem in a 2005 Toyota Prius?

While the vehicle may still be driveable in some cases, ignoring this code can lead to decreased fuel efficiency and potential emissions issues, so it is best to address it promptly.

10. How much does it cost to repair OBDII code P2401 in a 2005 Toyota Prius?

The cost of repair can vary depending on the specific cause of the code and whether it can be fixed with simple repairs or requires component replacement. It is best to consult a mechanic for an accurate estimate.