Question about 2002 Chevrolet Impala
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Posted on Jan 02, 2017
Usually oxygen sensors are attache to the exhaust, one after the exhaust manifold and one right before or after the CAD. That means some cars have two.
Posted on Oct 18, 2009
There are two sets of 02 sensors on most cars today. On set is set directly behind the header, one on each side, if it is a V engine. This set is used for the engine's ECU to control timing as well as other variables. The other set is placed on a bung in your Catalytic converter. This 02 sensor is used for emissions purposes only.
Posted on Jun 01, 2010
SOURCE: I have a 2001 chevy
Bank1 ---is always the side of the engine cylinder #1 is on
Bank 2 --- the other side
Sensor1---the ones closest to the engine either in or just before the converter
Sensor2 --- is the down stream or monitor sensor in the outlet of converter
Just replace all upstream O2 Sensors,ones before the converter by 100,000
miles or in your case when they fail
Only a guess but #1 may be on the left side,you don't do just one if you have more
You don't need to do the rear sensors though
Posted on Sep 21, 2011
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Oct 12, 2011 | 2002 Chevrolet Impala
Chevrolet Impala comes equipped with two oxygen sensors, one on either side of the catalytic converter. Locating the sensors is as simple as crawling under the vehicle.
The bank 1, sensor 2 oxygen sensor is located downstream of the catalytic converter. To get to the sensor, crawl underneath the vehicle and trace the exhaust pipe until you reach the catalytic converter. Continue to follow the exhaust pipe until you reach the bank 1, sensor 2 oxygen sensor.
You should be able to identify the oxygen sensor as a single wire about 3 to 6 inches long. The oxygen sensor is mounted to the exhaust pipe and should slightly protrude from the pipe.
The oxygen sensor is an important part of the vehicle exhaust system. The sensor tests the amount of air in the exhaust stream. It then sends this information to the engine control computer, which determines how much fuel is necessary to maintain a proper air-to-fuel ratio.
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