What is the secondary air system?

What is the secondary air system?

Secondary-air systems have been successfully employed to reduce such cold starting emissions. To reduce the level of these pollutants, ambient air with a high oxygen content (“secondary-air”) is injected into the exhaust manifold directly downstream of the exhaust valves during the cold starting phase.

What controls the secondary air pump?

FUNCTION OF THE ACTIVE SECONDARY AIR SYSTEM: FUNCTION The system is controlled by the engine control unit. The engine control unit deactivates the electric pump and the pneumatic control valve. The combination valve is also closed, preventing hot exhaust emissions from reaching the electric pump and damaging it.

How does secondary air system work?

Secondary air injection systems pump outside air into the exhaust stream so unburned fuel can be burned. Newer aspirated systems use the vacuum created by an exhaust pulse to pull air into the pipe. The latest systems use an electric motor to pump air. These systems are critical for the life of the catalytic converter.

How do you fix a secondary air system?

How to Fix

  1. Replace both the air pumps and the one-way check valve.
  2. Try and clean the air pump and test it. The one-way air check valve must be replaced as well.
  3. Replace the inlet hose of the air pump.
  4. Replace the fuse of the air pump (you can find it under the hood)

Is secondary air pump necessary?

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.

Can you drive without secondary air pump?

You will be fine driving to work in the morning. You will get or already have a CEL for hose being disconnected. The pump only runs for a minute or so on cold start to help burn exhaust gases and heat up the O2 sensor. The reason for the brown color is most likely due to rust from condensation in the pump.

What is the prime source of problems in secondary air systems?

WATER is a prime source of problems in secondary air systems.

How do you test a secondary air valve?

The secondary air valve can be quickly inspected in an easy way:

  1. Loosen the connecting hose on the secondary air non-return valve leading to the secondary air pump.
  2. If there are deposits on this side of the valve (finger test, see Fig.
  3. Inspect the secondary air pump and replace it if necessary.

What do you need to know about a secondary air pump?

If you’re wondering what a secondary air injection pump is, you’re not alone. In this article, we’ll go over the purpose of the secondary are pump as well as the symptoms you should watch for that indicate the pump is failing. What Does a Secondary Air Pump Do? What Does a Secondary Air Pump Do?

How does a secondary air injection system work?

This component is also called a smog pump, or an air pump, and it lies within the secondary air injection system of the vehicle. It can reduce carbon emissions by pumping fresh air from outside into the exhaust stream. By the time fumes leave the tailpipe, there are fewer hydrocarbon pollutants in them.

How to troubleshoot a faulty secondary air system?

In most cases, a fault in the secondary air system can be identified by a scratching or whistling noise, or by the secondary air pump no longer working. In this technical video, we provide tips on troubleshooting and show how you can test the components in the secondary air system using simple methods. http://www.ms-motor-service.com/en/re…

What is the diagnostic code for secondary air injection?

P0410 is a diagnostic trouble code (DTC) for “Secondary Air Injection System Malfunction”.