This is a discussion on o2 sensor within the External Engine forums, part of the LSx Technical Help Section category; Can any one tell me which wire on the o2 sensor plug is the reference voltage and which one is ...
09-26-2008, 02:13 PM #1
Can any one tell me which wire on the o2 sensor plug is the reference voltage and which one is the o2 sensor output.
I have an 02 WS6 Firebird, there are four wires. one looks purple, tan, brown, and black. I'm assuming the black is ground and I believe the brown is 12 volt for the sensor heater. SO I have it narrowed down to either the purple or the tan.
Anyone's help would be greatly appreciated.
09-26-2008, 02:42 PM #2
- Join Date
- Dec 2005
- Laurel, Maryland
2000 Grand Prix GTP
- 2000 Trans Am WS6 M6
I'm assuming you are looking for which wire to hook your A/F Ratio Gauge to...I used the front Passenger O2 which had a Purple wire that led into a blue wire after the connction.
09-26-2008, 07:11 PM #3
HO2S Low Signal [Bank 1 Sensor 1]
HO2S High Signal [Bank 1 Sensor 1]
Ignition 1 Voltage
09-26-2008, 09:37 PM #4
I also contacted a SIMS maker who stated this Diode is basically the same thing they use in the o2 SIMS. But it has to be installed INLINE with the output wire and not in the reference or the o2 heater circuit.
09-26-2008, 09:39 PM #5
09-27-2008, 09:14 AM #6
try it if you like, it might work better for you
09-27-2008, 10:23 AM #7
09-27-2008, 10:27 AM #8
I would like to have the codes turned off but I can't find anyone around here that has the software to turn it off and I don't like the idea of sending my PCM off to have it done.
Anyone know of someone around Dyersburg, TN that could turn off the p0420 and p0430 codes for me or I would be willing to drive as far as Memphis if someone can give me a contact person.
09-27-2008, 01:01 PM #9
09-27-2008, 01:04 PM #10
09-27-2008, 04:26 PM #11
I put the diode in this morning and everything is FANTASTIC. Car is running great and no DAMN SES light!!!!!!!!!!!!!!!!
I was getting the SES light about every third time I started it. I put about 300 miles on the car today with a combination of Highway and stop-n-go city traffic.
The car was stopped and started about 20 times today with the longest run being about two hours. NO SES LIGHT!!!
When I got home I checked my connections and wires to make sure nothing was HOT or shorted. Everything looks good and feels good.
I'll monitor the thing for awhile and get re-post on the outcome. Maybe this will solve the SES light and the CATs will come off.
mark21742: Hit me back with the name of the o2 simulators you are running, I don't want to run anything that is going to get that HOT. I found a set of store bought ones that look like the o2 sensor pigtail but I can't find any reviews or info on the things.
09-27-2008, 08:24 PM #12
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