Question about 1999 Chevrolet Silverado 1500

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Need to know which side of vehicle is bank 2

2004 avalanche replacing oxygen sensor for bank 2 sensor 2 need, to know if it is on passenger side or drivers side and in front of catalytic or after . thank for help

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The sensor bank 2 sensor 2 is on the right side after the catalytic converter

Posted on Jan 08, 2009

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The 1999 5.3 V8 engine had 4 oxygen sensors. There are two catalytic converters on this engine, one on the driver side of the engine, and one on the passenger side of the engine. This is important to know, as the number of oxygen sensors is directly related to the number of catalytic converters on the vehicle. Driver side is referred to as Bank 1, passenger side is referred to as Bank 2. This is very important to know when looking up replacement oxygen sensors. There is one oxygen sensor in front of, or before the catalytic converter, usually referred to as a pre-catalyst O2 sensor. There is also one behind, or after the catalytic converter, usually referred to as a post-catalyst oxygen sensor. So, you have two oxygen sensors on Bank 1, and two oxygen sensors on Bank 2, for a grand total of 4 oxygen sensors.

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I have seen Belive it or not Oxygen sensors cause this, if the sensor is pegged rich or lean on that bank it will make the fuel trim to rich or to lean and then the engine will misfire, check the wires to the oxygen sensors and make sure that they are not broken or rubbed through... there is a spot on the passenger side right where the wiring harness crosses the frame that i have seen them rub on and brake the wires.... if the wires are ok try and disconnect the oxygen sensors one at a time on the passenger side and see if the miss goes away..... if not i have seen one other truck where the intake manifold gasket on the passenger side had blown out and was causing a vacuum leak between cylinders and causing a missfire hope this helps some...

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Where i find bank2 sensor 1?


you will need to call a dealer and see what bank is what because different manufacturers bank the vehicles different. usually bank 2 is the passengers side, sensor 1 is the sensor closest to the engine.. of course on a front wheel drive if the engine is on the passengers side bank 2 would be the back side closest to the firewall. but when it sais sensor 1 that always means the oxygen sensor closest to the engine. sensor 2 is the oxygen sensor closest to the converter. hope this helps

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Pluged in the computer to my truck and it said there is a o2 sensor malfunction of bank 2. how do i find it? also it says the truck is running to lean. is this cause by the o2 sensor?


Yes, this too lean runing engine is due of oxygen O2 sensor malfunction. Must be replaced with new one. You can find it very simply on bank 2. The bank 1 of V8 engine is the cylinder bank on the right (passenger's) side of the car, (for Left Hand Drive vehicles). So the bank 2 is placed on the left (driver's) side of the car, (for Left Hand Drive vehicles). The bad oxygen O2 sensor is fitted on bank 2, so you can replace it.

Please rate my response. Thanks!

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