AutoCodes – Volvo – P2406 Volvo

P2406 Volvo Code - EVAP System Leak Detection Pump Sense Circuit High

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: P2406 Volvo indicates EVAP System Leak Detection Pump Sense Circuit High.
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 1,155

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 20, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2406 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 P2406 Volvo - EVAP System Leak Detection Pump Sense Circuit High - AutoCodes.com — P2406 Volvo Code - EVAP System Leak Detection Pump Sense Circuit High

What does this mean?

What are the Possible Causes of the DTC P2406 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 P2406 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 P2406 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 P2406 Volvo Code

1. What are the common symptoms of OBDII code P2406 in a Volvo?

- The common symptoms include the Check Engine Light (CEL) illuminating on the dashboard and potential issues with the vehicle's evaporative emission control system.

2. What causes the OBDII code P2406 in a Volvo?

- The code P2406 typically indicates a malfunction in the EVAP system leak detection pump sense circuit, often caused by a faulty leak detection pump, damaged wiring, or a defective sensor.

3. Can driving with OBDII code P2406 in a Volvo cause further damage?

- Driving with code P2406 may not cause immediate harm to the vehicle, but it can lead to increased emissions and potential issues with passing emissions tests.

4. How can I diagnose OBDII code P2406 in my Volvo?

- Diagnosis usually involves using an OBDII scanner to read the code, inspecting the EVAP system components for damage, checking the wiring and connections, and testing the leak detection pump and sensor.

5. Is it safe to continue driving my Volvo with code P2406?

- While driving with the code is generally safe for a short period, it is advisable to address the issue promptly to prevent potential problems with the emissions system.

6. How can I repair OBDII code P2406 in my Volvo?

- Repairing code P2406 often involves replacing the faulty leak detection pump, repairing damaged wiring or connections, or replacing the sensor causing the high circuit signal.

7. Are there any DIY tips for troubleshooting code P2406 in a Volvo?

- DIY troubleshooting tips may include visually inspecting the EVAP system components for damage, checking the wiring for breaks or loose connections, and ensuring the gas cap is tightened securely.

8. How much does it typically cost to repair OBDII code P2406 in a Volvo?

- The cost of repairing code P2406 can vary depending on the extent of the issue, but it may range from $100 to $500, including parts and labor.

9. Can I reset the Check Engine Light after fixing OBDII code P2406 in my Volvo?

- Yes, once the underlying issue causing code P2406 is fixed, you can reset the Check Engine Light using an OBDII scanner to clear the code and turn off the warning indicator.

10. How often does OBDII code P2406 occur in Volvo vehicles?

- OBDII code P2406 related to the EVAP system leak detection pump sense circuit high can occur sporadically in Volvo vehicles, especially as they age or if maintenance is neglected.