AutoCodes – Scion – P2401 Scion

P2401 Scion Code - Evaporative Emission Leak Detection Pump Stuck OFF

Quick Answer

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister 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 Scion indicates Evaporative Emission Leak Detection Pump Stuck OFF.
Common causes: Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister 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 19,927

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 Mar 26, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2401 Scion 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 Scion - Evaporative Emission Leak Detection Pump Stuck OFF - AutoCodes.com — P2401 Scion Code - Evaporative Emission Leak Detection Pump Stuck OFF

What does this mean?

What are the Possible Causes of the DTC P2401 Scion?

Faulty Canister Pump Module
Canister Pump Module harness is open or shorted
Canister Pump Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2401 Scion?

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 Scion 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 Scion code?

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

Need Help with the Code?

Get the P2401 Scion code diagnosed by a professional: Find a repair shop in your area

Information for Specific Scion Models

P2401 2005 Scion xB — Evaporative Emission Leak Detection Pump Stuck OFF
P2401 2006 Scion xB — Evaporative Emission Leak Detection Pump Stuck OFF
P2401 2007 Scion xB — Evaporative Emission Leak Detection Pump Stuck OFF

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 Scion Code

1. What are the common symptoms of OBDII code P2401 in a Scion related to the Evaporative Emission Leak Detection Pump being stuck OFF?

- The Check Engine Light may illuminate on the dashboard, indicating a problem with the evaporative emission system.

2. What are the possible causes of OBDII code P2401 in a Scion?

- The most common cause is a malfunction in the Evaporative Emission Leak Detection Pump, which can get stuck in the OFF position.

3. How serious is OBDII code P2401 in a Scion?

- While this code may not cause immediate drivability issues, it is important to address it promptly to prevent potential long-term damage to the emissions control system.

4. Can OBDII code P2401 in a Scion be fixed without professional help?

- Depending on your level of automotive knowledge, you may be able to diagnose and repair this issue yourself by checking the connections and functionality of the Evaporative Emission Leak Detection Pump.

5. How can I diagnose the cause of OBDII code P2401 in my Scion?

- You can use an OBDII scanner to retrieve the code and then inspect the Evaporative Emission Leak Detection Pump, its wiring, and associated components for any visible signs of damage or malfunction.

6. What are some repair tips for fixing OBDII code P2401 in a Scion?

- Make sure to check the electrical connections and wiring leading to the Evaporative Emission Leak Detection Pump, as loose connections or damaged wires can also trigger this code.

7. Is it safe to continue driving my Scion with OBDII code P2401 present?

- It is generally safe to drive your vehicle with this code, but it is recommended to address the issue as soon as possible to ensure proper emission control and engine performance.

8. How much does it typically cost to repair OBDII code P2401 in a Scion at a professional auto repair shop?

- The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Can a faulty gas cap cause OBDII code P2401 to appear in a Scion?

- While a faulty gas cap can trigger some evaporative emission codes, OBDII code P2401 specifically relates to issues with the Evaporative Emission Leak Detection Pump itself.

10. Are there any recalls or technical service bulletins related to OBDII code P2401 in Scion vehicles?

- It's recommended to check with a Scion dealership or refer to the manufacturer's website for any recalls or technical service bulletins related to this specific OBDII code.