Question about 2005 Chevrolet Impala
Sensor 1 is before the catalytic converter and sensor 2 is after the converter.
Click this link for more help:---- http://technoanswers.blogspot.com/2011/05/where-is-o2-sensor-bank-1-on-2005-chevy.html ------------ This should help.Thanks.Helpmech.
Posted on May 18, 2011
BANK 1 UP STREAM OXYGEN SENSOR LOCATION IS LOCATED ON THE REAR EXHAUST MANIFOLD.
Posted on May 18, 2011
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Posted on Jan 02, 2017
Bank 1 is the rear O2 sensor, but experience says to change both. The front one is right behind the engine in the middle of the engine compartment. The rear O2 sensor is on the top of the exhaust pipe, just behind the catalytic converter. But the same code that shows it is the O2 sensor (which is P0420), is the same code for the catalytic converter, or a vacuum leak. Make sure if you do change the catalytic converter, ensure that the new one is OBD-2 compliant. And the vacuum leak could possibly come from the manifold gasket. Let me know what the problem was!
Posted on Mar 26, 2009
Oxygen sensors are numbered by which bank of cylinders they serve. Bank 1 is the left or drivers side bank of cylinders on the 4.3L which has the odd numbered cylinders 1,3, and 5. Bank 2 is the right or passenger side bank of cylinders numbered 2, 4, and 6. The Bank 1 Sensor 1 would be the sensor for the left hand side of the engine AHEAD of the converter. Bank 1 Sensor 2 is the sensor for the left hand side bank of cylinders BEHIND the converter.
Posted on Jun 02, 2010
There are 2 oxygen sensors on the 2004 Impala, located under the car near the CAT converter.
Jack up the passenger side or onto ramps to make easier acess.
Posted on Feb 03, 2011
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