Symptoms of a defective or defective exhaust air supply tube

Symptoms of a defective or defective exhaust air supply tube
The exhaust air supply tube is an exhaust and emission component that is commonly found in many road vehicles. Its main objective is to allow air to enter the exhaust stream so that the temperature of the exhaust gas can be raised to the correct level for the catalytic converter to operate. Catalytic converters and oxygen sensors require a specific temperature to operate, and are mostly inoperable during the first minutes after the engine has started.


The exhaust air supply tube injects air into the exhaust flow just as it leaves the engine to increase the temperature, so that catalytic converters and oxygen sensors can reach operating temperature as soon as possible. As the exhaust air supply tube is a component of the exhaust system, it is subject to high temperatures and stress and, therefore, is susceptible to oxidation or corrosion due to extreme conditions. When it fails or has a problem, it can cause problems with the driving ability and emission levels of a vehicle. Usually, a defective or defective exhaust air supply tube will produce some symptoms that can alert the driver of a possible problem.

1. Exhaust leaks

One of the first symptoms of a problem with the exhaust air supply tube is an escape leak. If the exhaust air supply pipe is broken, cracks may form, an escape leak could occur. Exhaust leaks often produce a hissing or pounding sound coming from the engine compartment, and if left unchecked, it can become a problem with the engine.

2. Engine performance problems

Another symptom of a possible problem with the exhaust air supply tube is engine performance problems. If the tube effectively has an exhaust leak and the leak is large enough, it can cause the vehicle to experience a reduction in power, acceleration and even fuel efficiency.

3. Increase in emissions

Another symptom of a defective or defective exhaust air supply tube is increased emissions. A blocked, clogged, damaged or broken tube can also cause the vehicle to increase emissions. An escape leak due to a broken tube can cause the oxygen sensors to give an incorrect reading and decrease the efficiency of the catalytic converter. A clogged tube will restrict the flow of air in the exhaust stream, which will also affect the operation of the oxygen sensors and the catalytic converter. Both issues can lead to an increase in the production of engine emissions, which will be a problem for states where emissions are strictly regulated.

While many newer vehicles are adopting different emission technologies and, therefore, components, exhaust air supply pipes are still commonly found in many cars and trucks. If you suspect that your exhaust air supply tube may be having a problem, have a professional technician inspect the vehicle, such as a Vermin-Club, to determine if your vehicle needs a replacement exhaust air supply tube.