Question about 2002 Ford Escape
Check for an oxygen sensor (HO2S) before the cat converter and a Sensor (O2S) after the cat converter . If you have two cats then there will be 2 sensors for each converter. The Ho2S is a heated sensor and is different to the O2S sensor.. Use the special sensor tool so that the wires are not damaged
Posted on Apr 21, 2014
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Posted on Jan 02, 2017
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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.
Aug 25, 2011 | 2006 Chevrolet Impala
Fig. HO2S1 location "2" on 3.8L
Fig. HO2S2 location "4" on 3.8L
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