AutoCodes – Toyota – P2401 2006 Toyota Prius

P2401 2006 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 2006 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 2,743

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 2006 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 2006 Toyota Prius - EVAP System Leak Detection Pump Control Circuit Low - AutoCodes.com — P2401 2006 Toyota Prius Code - EVAP System Leak Detection Pump Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2401 2006 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 2006 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 2006 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 2006 Toyota Prius code?

Need more information on how to fix the P2401 2006 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2006 Toyota Prius Code

1. What does OBDII code P2401 mean for a 2006 Toyota Prius?

The code P2401 indicates a problem with the EVAP system leak detection pump control circuit, specifically a low voltage condition.

2. What are the common symptoms of a P2401 code in a 2006 Toyota Prius?

Common symptoms include the illumination of the check engine light, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

3. What are the possible causes of the P2401 code in a 2006 Toyota Prius?

Possible causes include a faulty leak detection pump, damaged wiring or connectors in the control circuit, a defective EVAP pressure sensor, or a malfunctioning ECM.

4. How can I diagnose the cause of a P2401 code in my 2006 Toyota Prius?

Diagnosis typically involves inspecting the EVAP system components, checking for damaged wiring or connectors, testing the leak detection pump, and using a scan tool to monitor system data.

5. Can I continue driving my 2006 Toyota Prius with a P2401 code?

It is generally not recommended to drive the vehicle with a P2401 code, as it can lead to increased emissions, decreased fuel efficiency, and potential damage to the emissions control system.

6. How can I repair a P2401 code in my 2006 Toyota Prius?

Repair options may include replacing the leak detection pump, repairing damaged wiring or connectors, replacing the EVAP pressure sensor, or reprogramming the ECM.

7. Will resetting the check engine light clear a P2401 code in a 2006 Toyota Prius?

Resetting the check engine light may temporarily clear the code, but it is important to diagnose and repair the underlying issue to prevent the code from reoccurring.

8. How much does it cost to repair a P2401 code in a 2006 Toyota Prius?

The cost of repairing a P2401 code can vary depending on the specific cause of the issue, but it may range from a few hundred to a thousand dollars at a dealership or repair shop.

9. Can a DIY enthusiast fix a P2401 code in a 2006 Toyota Prius?

While some DIY enthusiasts may have the skills and tools to address a P2401 code, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

10. How often does the P2401 code occur in a 2006 Toyota Prius?

The P2401 code may occur sporadically or more frequently depending on the driving habits, maintenance history, and overall condition of the EVAP system in the 2006 Toyota Prius.