What is the P2440 fault code What is the description of Secondary Air Injection System Switching Valve Offset Bank 1 Failure? How do I fix the P2440 fault code What are the symptoms and causes for the P2440 fault code
What is P2440 Fault Coding? What does it signify?
To reduce carbon emissions, some vehicles come with secondary air injection systems. The secondary air injection pump pumps fresh air into your exhaust system to reduce exhaust emissions. The vehicle, application and type of the vehicle will determine whether the system supplies air to either the catalytic converter or the exhaust manifolds. Additional air reduces harmful exhaust gases by oxidation. Additionally, additional air helps to speed up the heating process of the catalytic conversion, prolonging its lifespan.
When you start your engine, the primary air injection system will be used. The pump can be driven either electrically or with a crankshaft and belt. The engine requires more fuel mixture during cold starts. The PCM opens the valve when the engine is cold. Fresh air is then drawn from the pump to each of the exhaust ports. Once the catalytic convert reaches normal operating temperatures, the valve turns off and activates the pump.
The powertrain control module, or PCM, continuously monitors secondary air injection system pressure and flows. The voltage signal transmits this information to the PCM. The malfunction lamp will light up if the voltage signal from your system is higher than the manufacturer’s specifications of 10%. “Bank 1” In the description of code, refers to engine bank containing engine cylinder 1. This indicates that the secondary air injector switching valve on this bank is in an open position and that the PCM cannot control the system.
Some vehicles are prone to the P2440 fault code, including, but not limited, to various models of Chevrolet and Toyota, Lexus Volkswagen, Lexus, Audi, Lexus and Cadillac as well as Nissan, BMW, Seat Mazda, Cadillac, Jeep, and Nissan.
What is the P2440 Fault Code?
These are the most common reasons that P2440 fault codes are triggered:
- – Defective secondary injection valve
- – A defective one-way valve check valve
- – Defective Air Injection Pump
- – Defective pressure sensor
- – Defective system enable valve
- – Vacuum hoses that are not connected or blocked
- – Connectors and wiring that are damaged, burnt, shorted or disconnected.
- – Faulty relays or blown fuse
- – A PCM that is not working or requires a software upgrade
What are the symptoms of the P2440 fault code?
You may experience the following symptoms if your vehicle has the code P2440:
- – Illumination at the check engine lights
- – Engine starting difficult or stalling immediately after starting
- – Loss of power when acceleration (stumbles and hesitations, shaking)
- – Low engine performance
- – Engine stops at idle
- – The secondary air injection system is noisy and inefficient
- – Total failure of the secondary injection system
- – PCM may enter failsafe mode to limit engine power
How do I fix the P2440 fault code?
Fault code P2440 is often overlooked because of one-way check valves. Failing to repair the one-way check valve can be the main reason this code is set. It is therefore crucial to monitor it. It is possible to damage other parts of the secondary air injection system if the pump is not replaced or the faulty check valves aren’t replaced.
Some repairs that could resolve the P2440 fault code are:
- Repair of damaged cables, connectors and open or short circuit issues
- Repairing an air injection valve that is not working properly
- – Replacing a defective one way check valve
- Replacing a defective air injection pump
- – Replacing an inoperable pressure sensor
- – Removing the damaged system will enable you to replace it.
- – Replacing faulty relays and blown fuse fuses
How serious is the P2440 fault code?
The P2440 code can cause the vehicle to stall in operation or to hesitate while it accelerates. This code is dangerous. This fault code P2440 should be taken seriously and diagnosed as soon as possible.
