AutoCodes – Volvo – P2401 Volvo

P2401 Volvo Code - EVAP System Leak Detection Pump Control Circuit Low

Quick Answer

This fault code is stored in the engine control module when there is a malfunction with the evaporative emissions control circuit. Common causes include Faulty EVAP System Leak Detection Pump, EVAP System Leak Detection Pump harness is open or shorted, EVAP System Leak Detection Pump 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 Volvo indicates EVAP System Leak Detection Pump Control Circuit Low.
Common causes: Common causes include Faulty EVAP System Leak Detection Pump, EVAP System Leak Detection Pump harness is open or shorted, EVAP System Leak Detection Pump 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 2,852

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 May 02, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2401 Volvo Description

This fault code is stored in the engine control module when there is a malfunction with the evaporative emissions control circuit. The EVAP system allows the fuel tank to be vented in a controlled manner without releasing harmful gas emissions into the atmosphere. This is achieved by periodically allowing hydrocarbon emissions from the fuel tank into the intake manifold and enter the combustion process. The engine control module monitors the circuit integrity by monitoring the inductive spike generated when the solenoid valve is switched off. This is caused by the collapse of the magnetic field resulting in a back EMF (electro-motive force). A solenoid normally has a resistance of 15 Ohms. The solenoid valve will be actuated by a pulse width modulated control via the engine control module. The solenoid can be powered up by a constant supply at system voltage or have a constant ground.
The system may not purge the carbon canister under idle conditions. The vehicle may need to be driven for the system to operate, an actuator test may be used to operate the solenoid valve with a scan tool.
Due to the presence of harmful hydrocarbons within the system manufacturers have to closely monitor the system, in some markets. This is achieved by the addition of certain hardware to measure system pressure and gas flow. The engine control module can monitor the system for leaks (both large and small) and for excessive or insufficient flow. This allows the technician access to more information relating to the fault and provides a better chance of an accurate diagnosis.

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

What does this mean?

What are the Possible Causes of the DTC P2401 Volvo?

Faulty EVAP System Leak Detection Pump
EVAP System Leak Detection Pump harness is open or shorted
EVAP System Leak Detection Pump circuit poor electrical connection

How to Fix the DTC P2401 Volvo?

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 Volvo 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.

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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 Volvo Code

1. What are the common symptoms of OBDII code P2401 in a Volvo?

- Common symptoms include the check engine light coming on, decreased fuel efficiency, rough idling, and a noticeable gasoline smell.

2. What causes the OBDII code P2401 to trigger in a Volvo?

- The code is typically triggered by a malfunction in the EVAP (evaporative emission control) system leak detection pump control circuit, often due to a faulty pump or wiring issues.

3. How serious is the OBDII code P2401 in a Volvo?

- While the code itself may not cause immediate harm to the vehicle, it can lead to increased emissions and potential issues with passing emissions tests.

4. Can I continue driving my Volvo with the OBDII code P2401 present?

- It is generally safe to drive the vehicle with this code, but it's recommended to address the underlying issue promptly to avoid potential long-term problems.

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

- A thorough inspection of the EVAP system components, including the leak detection pump, hoses, and wiring, is necessary to pinpoint the exact cause of the code.

6. What are the repair options for fixing OBDII code P2401 in a Volvo?

- Repair options may include replacing the leak detection pump, repairing or replacing damaged wiring, or addressing any other issues identified during the diagnostic process.

7. Can I reset the check engine light after fixing the OBDII code P2401 in my Volvo?

- Yes, once the underlying issue has been resolved and the fault codes have been cleared, the check engine light can be reset using an OBDII scanner.

8. Are there any maintenance tips to prevent the recurrence of OBDII code P2401 in a Volvo?

- Regularly inspecting the EVAP system components for damage or wear, ensuring proper sealing of gas cap, and following recommended maintenance schedules can help prevent the code from reoccurring.

9. Will fixing OBDII code P2401 improve my Volvo's fuel efficiency?

- Yes, addressing the issues causing the code can help improve fuel efficiency by ensuring proper operation of the EVAP system and reducing emissions.

10. How long does it typically take to repair OBDII code P2401 in a Volvo?

- The repair time can vary depending on the exact cause of the code and the complexity of the repair, but it may range from a few hours to a full day at a repair shop.