AutoCodes – Generic – P2440

P2440 Code - Secondary Air Injection System Switching Valve Stuck Open Bank 1

Quick Answer

To accelerate the activation of catalyst when warming up the engine, the air injection system pumps the secondary air to the exhaust manifold by pressure. Common causes include Faulty Vacuum Switching Valve (VSV), Vacuum Switching Valve (VSV) harness is open or shorted, Vacuum Switching Valve (VSV) 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: P2440 indicates Secondary Air Injection System Switching Valve Stuck Open Bank 1.
Common causes: Common causes include Faulty Vacuum Switching Valve (VSV), Vacuum Switching Valve (VSV) harness is open or shorted, Vacuum Switching Valve (VSV) 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 39,955

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 P2440 Description

To accelerate the activation of catalyst when warming up the engine, the air injection system pumps the secondary air to the exhaust manifold by pressure. The secondary air is supplied by the air pump and it is pumped to the exhaust manifold through the air switching valve. Open and close movement of the air switching valve is regulated by the Vacuum Switching Valve (VSV).The air pump and the air switching valve are observed by the Engine Control Module (ECM) and are used to detect malfunction in this system. The ECM monitors the secondary air injection system and detects malfunction using a pressure sensor located on the air switching valve.
The ECM observes the pressure in the secondary air passage using the pressure sensor located on the air switching valve in the secondary air injection system. The sensor detects an exhaust pressure in the secondary air passage.

OBDII Code P2440 - Secondary Air Injection System Switching Valve Stuck Open Bank 1 - AutoCodes.com — P2440 Code - Secondary Air Injection System Switching Valve Stuck Open Bank 1

What does this mean?

What are the Possible Causes of the DTC P2440?

Faulty Vacuum Switching Valve (VSV)
Vacuum Switching Valve (VSV) harness is open or shorted
Vacuum Switching Valve (VSV) circuit poor electrical connection
Faulty Pressure Sensor
Faulty Air Switching Valve

How to Fix the DTC P2440?

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 P2440 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 P2440 code?

Need more information on how to fix the P2440 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2440 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2440 Audi — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 BMW — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Buick — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Cadillac — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Chevrolet — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Dodge — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 GMC — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Isuzu — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Lexus — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Pontiac — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Saturn — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Subaru — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Toyota — Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 Volkswagen — Secondary Air Injection System Switching Valve Stuck Open Bank 1

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 P2440 Code

1. What are the common symptoms of OBDII code P2440?

The common symptoms of code P2440 include the Check Engine Light illuminating on the dashboard, rough idling, decreased engine performance, and increased emissions.

2. What does the OBDII code P2440 indicate?

OBDII code P2440 indicates a malfunction in the Secondary Air Injection System Switching Valve on Bank 1, specifically that the valve is stuck open.

3. What are the possible causes of the Secondary Air Injection System Switching Valve stuck open Bank 1 error?

The possible causes of this error include a faulty secondary air injection system switching valve, a vacuum leak in the system, electrical issues, or a clogged air injection system.

4. How can I diagnose the cause of OBDII code P2440?

Diagnosing the cause of code P2440 typically involves conducting a visual inspection of the air injection system components, checking for vacuum leaks, testing the switching valve for proper operation, and using a scan tool to monitor system readings.

5. Can I continue driving my vehicle with OBDII code P2440?

While it may be possible to drive the vehicle with this code present, it is not recommended as it can lead to increased emissions, decreased fuel efficiency, and potential damage to the catalytic converter.

6. How can I repair OBDII code P2440?

Repairing code P2440 involves addressing the root cause of the issue, which may include replacing the faulty switching valve, repairing any vacuum leaks, clearing any clogs in the system, or addressing any electrical faults.

7. Is it possible to reset OBDII code P2440 without fixing the underlying issue?

Resetting the code without fixing the underlying issue may temporarily turn off the Check Engine Light, but the code is likely to return if the root cause is not addressed.

8. Can a DIY enthusiast repair OBDII code P2440 at home?

Depending on the cause of the code, some DIY enthusiasts may be able to repair it at home by following step-by-step repair guides and using appropriate tools. However, complex issues may require professional assistance.

9. How much does it typically cost to repair OBDII code P2440?

The cost of repairing code P2440 can vary depending on the underlying cause and the labor rates in your area. It is advisable to obtain quotes from local mechanics or repair shops for an accurate estimate.

10. How can I prevent OBDII code P2440 from occurring in the future?

Regular maintenance of the secondary air injection system, including checking for leaks, cleaning components, and ensuring proper operation, can help prevent the recurrence of OBDII code P2440.