What is the sensor on the exhaust manifold?
The lambda sensor, also called an oxygen sensor, is a small probe located on the car exhaust, between the exhaust manifold and the catalytic converter. It was developed by Volvo in the 70s. If you own a newer car, it will be equipped with 2 lambda sensors.
Where is the O2 sensor in the exhaust manifold?
Fig. 2: Location No. 1 — Typical O2 Sensor located in the exhaust manifold Fig. 4: Location No. 3 — Exhaust collector (where more than 1 pipe joins together)
How does an O2 sensor work in a catalytic converter?
You can also check exhaust backpressure ahead of the converter by connecting a pressure gauge to the EGR exhaust port, an O2 sensor port, or an exhaust manifold air line connection. More than 1.25 psi of backpressure at idle, or more than 3 psi at 2,000 rpm usually indicates a blockage.
Where is the oxygen sensor in a car?
The Primary Oxygen (PHO2) sensor is placed between the catalytic converter and the exhaust system. The secondary sensor, located after the catalytic converter, is now used to monitor the first sensor to improve fuel economy and emissions control.
Is the catalytic converter part of the exhaust system?
Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. The catalytic converter is part of the exhaust system, processing all exhaust leaving the engine before it can escape into the atmosphere.
You can also check exhaust backpressure ahead of the converter by connecting a pressure gauge to the EGR exhaust port, an O2 sensor port, or an exhaust manifold air line connection. More than 1.25 psi of backpressure at idle, or more than 3 psi at 2,000 rpm usually indicates a blockage.
Why is my OBD not working on my catalytic converter?
The OBD II system can’t evaluate the converter if the upstream and downstream O2 sensors are not functioning normally. So any O2 sensor problems have to be dealt with before you can use the OBD II system to diagnose the converter. O2 sensors typically fail because of old age or contamination.
How does the oxygen sensor work in a BMW?
Oxygen sensors monitor the exhaust stream, comparing the oxygen content in it to the oxygen content of ambient air. When oxygen content is low, sensor voltage is high. When oxygen content is high, sensor voltage is low. The voltage created by the sensor is sent to the DME (engine control module) to help maintain a proper fuel mixture.
Where is the bank 2 oxygen sensor located?
Bank 2 Sensor 1 is pointed out with a green arrow. Bank 1 Sensor 2 has a green arrow. Bank 2 Sensor 2 is shown with a yellow arrow. Replacing sensors before catalytic converter: Oxygen sensors are located in the exhaust manifold.