How To Fix Code P2440

P2440 code definition

The P2440 diagnostic trouble lawmaking is an indication that the Powertrain Control Module (PCM) has detected that the switching valve of the secondary air injection system is stuck open on Banking concern 2.

P2441 OBD-II Trouble Lawmaking: Secondary Air Injection Organisation Switching Valve Stuck Closed Bank 1
P2442 OBD-Two Problem Lawmaking: Secondary Air Injection System Switching Valve Stuck Open up Bank 2
P2443 OBD-Two Problem Code: Secondary Air Injection System Switching Valve Stuck Closed Bank 2

What the P2440 code ways

The purpose of the secondary air injection system is to pump fresh air into the frazzle arrangement. This reduces the amount of harmful pollutants that are emitted past the frazzle. The PCM receives information from the secondary air injection organisation regarding pressure level and flow. This information is sent to the PCM through a voltage signal.

If the secondary air injection organization sends a voltage signal reading to the PCM that exceeds the manufacturer's specifications by at least ten (x) percent, the P2440 diagnostic trouble lawmaking will be stored and the Check Engine Lite will come up on.

What causes the P2440 lawmaking?

Faulty air injection valve
Faulty one-way check valve
Faulty air injection pump
Faulty pressure sensor
Pressure sensor wiring that is frayed, broken, or shorted
Pressure sensor connector that is damaged or corroded
Pressure sensor connector that has bent pins
Faulty vacuum switching valve
Vacuum switching valve wiring that is frayed, broken, or shorted
Vacuum switching connector that is broken, melted, corroded
Vacuum switching connector that has bent pins

What are the symptoms of the P2440 lawmaking?

Check Engine Low-cal is on
Secondary air injection system may be noisy
Engine may stall when idling
Engine may stall when starting the vehicle
Engine may hesitate when accelerating
P2440 diagnostic problem lawmaking stored in the PCM

How does a mechanic diagnose the P2440 lawmaking?

Uses an OBD-II scanner to collect freeze frame data and all the trouble codes that have been stored by the PCM.
Inspects vacuum switching valve wiring for frays, breaks, and shorts.
If any vacuum switching valve wiring has frays, breaks, and shorts, repair and replace equally required.
Inspect vacuum switching valve connector for impairment, corrosion, or bent pins.
If the vacuum switching valve connector is damaged, corroded, or has a bent pin, repair and replace equally required.
Clears all diagnostic trouble codes from the PCM and operates the vehicle or completes a test bulldoze to see if the P2440 trouble code comes back
Inspects pressure level sensor wiring for frays, breaks, and shorts.
If any pressure sensor wiring has frays, breaks, and shorts, repair and supersede as required.
Inspects pressure sensor connector for impairment, bent pins, and corrosion.
If the pressure level sensor connector is damaged, corroded, or has bent pin, repair and replace it every bit required.
Clears all diagnostic problem codes from the PCM and operates the vehicle or completes a exam bulldoze to encounter if the P2440 problem code comes back.
Inspects the one-manner check valve to ensure it is working properly.
If ane-way check valves are faulty, repair and replace them required.
Clears all diagnostic trouble codes from the PCM and operates the vehicle or completes a exam drive to see if the P2440 problem lawmaking comes back.
Clears all diagnostic trouble codes from the PCM and operates the vehicle or completes a test drive to see if the P2440 problem lawmaking comes back.
Inspects the air injection pump to ensure information technology is working properly.
Inspects the air injection pump hoses for breaks and loose connections.
If at that place are breaks and/or loose connection in the air injection pump hoses, repair or supersede as required.
Inspects the air injection organization fuses.
If at that place is damaged wiring or pumps that are causing a blown fuse, repair or replace them equally required.

Common mistakes when diagnosing the P2440 code

In nigh cases, the P2440 diagnostic trouble lawmaking is acquired by faulty 1-style cheque valves. Therefore, it is important to exam them to prevent a misdiagnosis and multiple secondary air injection pump replacements. It is likewise important to add a drain tube onto the pump housing when replacing the secondary air injection pump, every bit failing to do so could crusade multiple secondary air injection pump failures in the future.

How serious is the P2440 code?

When the P2440 diagnostic problem lawmaking is stored past the PCM the vehicle may stall out or hesitate during operation, and driving under these conditions is unsafe. For this reason, the P2440 problem code is considered serious and should diagnosed and repaired as soon as possible.

What repairs can set up the P2440 code?

Supercede faulty air injection valve
Supervene upon faulty one-style check valve
Replace faulty air injection pump
Replace faulty pressure sensor
Repair or replace frayed, broken, or shorted pressure sensor wiring
Repair or supersede damaged or corroded force per unit area sensor connector
Replace faulty switching valve
Repair or supervene upon frayed, cleaved, or shorted vacuum switching valve wiring
Repair or supervene upon melted, corroded vacuum switching connector
Repair or supervene upon aptitude pins in the vacuum switching connector

Faulty ane-way check valves are ofttimes overlooked when diagnosing the P2440 diagnostic problem lawmaking. Faulty 1-fashion check valves are a common cause of this code and so it is important to check them in order to forbid misdiagnosis. If the secondary air injection pump is replaced and faulty 1-mode check valves are non, this could cause harm to other components of the secondary air injection system.

Need aid with a P2440 code?

YourMechanic offers certified mechanics who will come to your abode or part to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at ane-800-701-6230.

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P2440

How To Fix Code P2440,

Source: https://www.yourmechanic.com/article/p2440-obd-ii-trouble-code-secondary-air-injection-system-switching-valve-stuck-open-bank-1-by-jamahl-walker

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