While living in a state which prides itself on being in the forefront when it comes to vehicle emissions, California, I was not surprised to receive my vehicle registration notice which related that I must take my vehicle in for a smog inspection.

Before we get to the tail pipe, we come to the muffler. This is an important part of the exhaust system and one we never think about. Since exhaust gas is shooting out the exhaust system at high pressure, it creates a lot of noise. The muffler reduces the backpressure of the exhaust, while at the same time improving engine efficiency, engine performance, the power output of the car and it even reduces the wear and tear of engine components. The most significant aspect of the muffler is the noise reduction it creates.

It will have some effect on power output, but not a lot. Its exact effect on HP is not clear, but it probably costs a few hp at the most, maybe 5-15hp at BPU(TM) power levels.

Another important task of the exhaust is to clean up all the emissions that may prove harmful to the environment. When the engine burns the fuel, it emits harmful gases like hydrocarbons, nitrogen oxides and carbon monoxide. The exhaust system, with the help of the catalytic converter recycling, cleanses these gases by breaking down the damaging gas compounds. The chemicals present in the catalytic converter act as catalyst. They change the extremely dangerous gas compounds into less destructive ones. In this era of environment conservation, it is almost a criminal offence in some countries not to have a catalytic converter. The converter is very important for the better performance of any exhaust system. Thus if your catalytic converter is not up to the mark, then you need to replace it immediately.

It will use a type of metallic catalyst. It will cause a chemical reaction up against the noxious gases that will turn them into gases that are not as harmful. The main 3 metals that are use are often rhodium, platinum or even palladium.

So we’ve decided to take the bitter pill. We have been dealt a P0411 secondary air injection malfunction. To understand what that means we’ll have to understand what the secondary air injection is and what it is meant to do when operating correctly.

Here’s the takeaway: if you intend to continue having mechanics perform all of the maintenance and repair work on your vehicle, find someone you can trust. In the meantime, consider buying your auto parts online and learning how to install them on your own.