P0411 indicates that the ECU has detected the flow from the secondary air injection system to be out-of-specification. This causes the Check Engine Light to be set and displayed on the dashboard. The light will remain on until normal operation occurs or repairs are performed.
What could cause a P0411 code?
DTC P0411 indicates the engine control unit (ECU) has detected an air flow problem within the secondary air injection system. The trouble code is fairly vague, in that, it does not identify a particular defective air injection component and requires a hands-on diagnosis to determine the root P0411 fault.
How do you fix a secondary air injection system malfunction?
What repairs can fix the P0410 code?
- Replacing the air injection pump and power relay.
- Replacing O2 sensors that respond too slow as they age.
- Replacing the air injection pump intake filter clogged with debris.
How much does it cost to replace a secondary air injection pump?
How much does it cost to repair a secondary air injection system? You can expect to pay about $450 to replace your secondary air injection system. These costs are split between the cost of materials and the cost of labor. You can save money by replacing your system on your own.
Where is the secondary air injection system located?
The secondary air injection pump is usually located on the engine or at least in the engine bay. It can sometimes be hidden deep into the engine bay, but mostly you will find it installed pretty visible on the engine.
Is a P0411 code bad?
Diagnostic trouble code (DTC) P0411 stands for “Secondary Air Injection Incorrect Flow Detected.” This code warns about a potential airflow issue in the secondary air system.
What is the secondary air injection system?
Secondary air injection (commonly known as air injection) is a vehicle emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream to allow for a fuller secondary combustion of exhaust gases.
Can you drive without secondary air pump?
The system is critical to help cars achieve government emissions standards. So, the law says you need a secondary air injection system. Which begs the question: Does a car need a secondary air injection system to run? Strictly speaking, no, it doesn’t.
How do you clean a secondary air injection valve?
The basic procedure is to put solvent and compressed air into the SAI system on the top of the engine and clean the ports from the bottom until air runs freely through the passages. The supplies you will need two bottle of carburetor cleaner.