Three trouble codes WTF

[96v6bird]

Okay, I took my car to autozone to get it scanned since I know I have P0420 because of a severe lack of a cat [img]graemlins/rock.gif[/img] . they pull 3 more codes and they are as follows:
P0137 - O2 Sensor Circuit Low Volts (Bank1 Sensor2)
P0138 - O2 Sensor Circuit High Volts (Bank1 Sensor 2)
P0140 - 02 Sensor CKT No Activity (on you guessed it) Bank1 sensor 2.

bank 1 sensor 2 is the o2 sensor behind the cat correct? also. why would the computer double the codes? i had 8 listed P0420,P0137,138,140 X 2 wtf is up with that?

[AllTheGoodNamesAreGone]

yeah.. i am 90% sure thats the post cat sensor.. sounds like its not hooked up.. are u running a SIM??

[AllTheGoodNamesAreGone]

the computer will sometimes set redundent codes.. i dont kno why.. but it does that when i scan mine with auto tap also.. its probably to show that it wasent jsut a ONE time issue..

what i dont undersand is how you could set the low and the high votage code..

[96v6bird]

i'm not running an o2 sim. i have true duals tho

[AllTheGoodNamesAreGone]

.....
thats probably it..
you probably jacked up the psot cat o2 sensor..

i really dont know how that setup would be with "true duals"

since you need 2 cats.. or no cats.. and well.. you only have one post cat 02 sensor.. so.. 1/2 of your exhaust is not getting metered.. i dunno.. you gota either get a sim.. or work something else out..

[Timbo1969]

You need a SIM.. I've got one and guess what... No codes.... [img]tongue.gif[/img]

[AllTheGoodNamesAreGone]

which sim do you have timbo..

all the ones i have never ****ing work.. they give me error codes..

[96v6bird]

but what gets me is the fact that it gave 3 codes that contradict each other. thats whats bugging me
iknew the o2 was dead.

[Timbo1969]

I got it at a V8 shop. It's the same one LS-1's use, they're sold in pairs.