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which o2 sensors for 2002 5.3 suburban
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jgoff Offline
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Post: #1
which o2 sensors for 2002 5.3 suburban
i have seen some say 1 o2 from bank 1 and 1 o2 from bank 2. on this wiring diagram it shows them kinda in the same position as they are located on exhaust. the 2 that look like they are in front of the cat. are both from bank 1? HELP! before i start chopping all kinds of wire s i dont need to.

http://content.chiltonsonline.com/conten...010331.pdf

this looks like 2 in front are:

bank 1 sensor 1 purple/white wire
bank 1 sensor 2 purple/ white wire

it seems that the two in front would perform the same operation therefore (logically speaking) they would be on the same bank.

any input?
05-27-2008 09:11 AM
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mike Offline
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RE: which o2 sensors for 2002 5.3 suburban
I can't tell from that schematic which sensors are upstream and which are downstream from the cat. You may have to trace them if you can't get better information. But once you've determined which sensors are which, the signal High wires are the ones you want. The signal low wires are ground.

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05-27-2008 09:20 AM
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HerronPerformance Offline
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RE: which o2 sensors for 2002 5.3 suburban
Bank 1 and bank 2 refer to side, sensor 1 is precat, sensor 2 is post cat.

http://www.herronperformance.com
05-28-2008 10:33 AM
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jgoff Offline
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RE: which o2 sensors for 2002 5.3 suburban
HerronPerformance Wrote:Bank 1 and bank 2 refer to side, sensor 1 is precat, sensor 2 is post cat.


then the correct ones would be
bank 1 sensor 1
bank 2 sensor 1

????? right.
05-28-2008 02:05 PM
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HerronPerformance Offline
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RE: which o2 sensors for 2002 5.3 suburban
yes
jgoff Wrote:
HerronPerformance Wrote:Bank 1 and bank 2 refer to side, sensor 1 is precat, sensor 2 is post cat.


then the correct ones would be
bank 1 sensor 1
bank 2 sensor 1

????? right.

http://www.herronperformance.com
05-28-2008 03:25 PM
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jgoff Offline
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RE: which o2 sensors for 2002 5.3 suburban
HerronPerformance Wrote:sweet , Thanks



yes
jgoff Wrote:
HerronPerformance Wrote:Bank 1 and bank 2 refer to side, sensor 1 is precat, sensor 2 is post cat.


then the correct ones would be
bank 1 sensor 1
bank 2 sensor 1

????? right.
05-28-2008 04:40 PM
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