The exhaust manifold is a part of the exhaust system that collects exhaust gases from the engine and directs them to the catalytic converter. There are several sensors that can be found on the exhaust manifold, including:
* Oxygen sensors: Oxygen sensors measure the amount of oxygen in the exhaust gas. This information is used by the engine control unit (ECU) to adjust the air-fuel mixture to maintain optimal combustion.
* Temperature sensors: Temperature sensors measure the temperature of the exhaust gas. This information is used by the ECU to control the operation of the engine cooling system.
* Pressure sensors: Pressure sensors measure the pressure of the exhaust gas. This information is used by the ECU to control the operation of the exhaust gas recirculation (EGR) system.
Oxygen Sensors
Oxygen sensors are one of the most important sensors in a vehicle's emissions control system. They measure the amount of oxygen in the exhaust gas, which is used by the ECU to adjust the air-fuel mixture. This helps to ensure that the engine is running efficiently and that harmful emissions are minimized.
There are two types of oxygen sensors: heated oxygen sensors (HO2S) and unheated oxygen sensors (UO2S). HO2S are more common and are used in most modern vehicles. They are heated to a high temperature, which allows them to respond more quickly to changes in the oxygen content of the exhaust gas. UO2S are not heated and are less common. They are typically used in older vehicles.
Oxygen sensors are located in the exhaust manifold or in the exhaust pipe. They are typically threaded into the exhaust system and are sealed with a gasket.
