"Service engine soon" light came on 3 weeks ago at 157,000 miles.  Went to Advance Auto and read the code, and it said Bank 2, Sensor 1 was bad.  So I replaced the driver side rear sensor with a brand new NTK OEM one that I got on Ebay a couple of years ago (I got a steal on two brand new OEM rear sensors).  Yesterday, the light came on again.  Went to Advance and read the code and it said the same thing.  So this time, I replaced the passenger side rear sensor.  Just curious....does anyone know how the sensors are labeled on the GVs.  I assume "Bank 2" denotes rear, and I figured "Sensor 1" would be driver side, but maybe not.  The service manual seems to make no distinction.  Thanks in advance to anyone who knows for sure.  Hopefully my light is out for good now!

Bank means left side or right side that I do know. A hanes or chilton should tell you which is left or right. Usualy the side of the motor with the "BANK" of cyliders further forward is bank 1.

97TRAKIN is correct the "bank" refers to which bank of cylinders is being read by that particular sensor.  Like he said, it's USUALLY the bank of cylinders more forward towards the pulleys that is bank 1 but there have been rare exceptions.

Sensor 1 / sensor 2 refers to which sensor in relation to the catalytic converter(s).  Sensor 1 is the one mounted closest to the engine, before the catcon, and reads the raw exhaust directly out of the engine before it is "cleaned" by the catalyst.  Sensor 2 is located AFTER the catalyst and reads the "cleaned" exhaust to make sure the catalyst is working properly.

So in your case, first off the sensor you want to get is accessed from above - don't go under your '99 GV you're getting the wrong sensor.  As for which bank is which right now I don't know off the top of my head.

James

My Suzuki FSM says (in the ECM terminal connections list):

Left (No 1) Bank Heated Oxygen Sensor
Right (No 2) Bank Heated Oxygen Sensor

My Suzuki FSM says (in the ECM terminal connections list):

Left (No 1) Bank Heated Oxygen Sensor
Right (No 2) Bank Heated Oxygen Sensor

 

Left/Right as in "sitting in the driver's seat"; or looking at the engine from in front of the car?   

Some manuals are really bad about stuff like this... not quite enough standardization.  I still find I always have to actually FIND A DIAGRAM to be certain.  (usually the one that shows firing order)

FWD Vee-Engine cars can be even more confusing.  "Left bank."  Ok so like is that the bank closest to the radiator or closest to the firewall?   Do I ride the engine like Slim Pickens and face the trans or the pulleys?
 

James

"Left" on the vehicle is left when sitting in the seat looking forward. 

"Left" on a fore-and-aft mounted engine is "left" on the vehicle.

On a transverse engine, the "front" is where the belt drive pulleys are located.  That usually is pointed to the right side of the engine bay, so the "left" side of the engine is closest to the radiator, and the "right" side is closest to the firewall.  This rule is an easy way to remember.

All manuals "should" follow these rules.  I've not found an exception in a manufacturers manual, but the others......

So, based on all of this info, and a few other things I found online, I'm guessing that Bank 2, Sensor 1 is the right (or passenger) front (pre-catalytic converter) oxygen sensor.  How's that sound?  I've replaced both rear sensors, and have the two front ones on the way from Rock Auto.  I will hopefully install the front two this week with the help of a lot of penetrating spray and torque.  After all, they've been on for 9 years!  Thanks for all of the info.

So, based on all of this info, and a few other things I found online, I'm guessing that Bank 2, Sensor 1 is the right (or passenger) front (pre-catalytic converter) oxygen sensor.  How's that sound? 

That's correct.

See this link...

http://www.suzuki-forums.com/suzuki-verona-chevrolet-epica-daewoo-magnus/17638-oxygen-sensors.html

I went through this myself (Max on the other forum). 

I included pics of the sensor locations also.

Well....while I was able to replace both rear sensors myself (although it was certainly not easy), the front ones were absolutely rediculous.  Even with my suspension and body lift, they were very difficult to reach, with only a few inches of clearance to work with.  Even after two shots of penetrating spray over a 4 day period, they were still heat-seized/rusted in place and wouldn't budge with me using a standard length ratchet and oxygen sensor attachment.  Had to take it to the shop, where they installed both in just under an hour for around $70.  Money well spent...what a pain in the a$$!!  Can't wait to see my new MPG figures, with four new O2 sensors.  Should gain a couple of MPGs...I hope!

they installed both in just under an hour for around $70.

Did the light go off? Did they use anti-sieze?