View Full Version : Narrowband Interchangable?
LastCall
May 3rd, 2010, 04:18 PM
I have an 01 truck. One of my narrowband sensors was bad, bank 2 post cat. I had an extra one from a 4.8 2004 van, both 4 wire O2 sensors. Both are bank 2 rear O2.
Are the O2's interchangable?
If so, does anyone having a wiring schematic? The colors are not the same.
I know it is not working becaise I am logging a sold .450 mv regardles of whether it is plugged in or not.
joecar
May 3rd, 2010, 07:17 PM
B2S2...
Let me know if these are not the right ones.
LastCall
May 4th, 2010, 02:53 AM
Thanks JoeCar!
I am concerned that the sensors are different inside. It seems like that the 4 wires are for:
Low Signal
High Signal
Ground
Positive
However, all sensors are 0 - 1 volts, so it should work, right?
joecar
May 4th, 2010, 03:03 AM
Yes, the 0-1V is on the High Signal wrt the Low Signal.
Just make sure you connect the pins correctly... the connectors/plugs have A B C D written on them.
There are two types of sensor: grounded-case and isolated-case... I don't know if this matters or not, probably not.
LastCall
May 4th, 2010, 03:55 AM
Yes, the 0-1V is on the High Signal wrt the Low Signal.
Just make sure you connect the pins correctly... the connectors/plugs have A B C D written on them.
There are two types of sensor: grounded-case and isolated-case... I don't know if this matters or not, probably not.
The pigtails were different on the sensor, so I need re-splice them in. Once I get the voltage to register, I will solder.
Do you mind taking a look at my tune to see if there is anything I need to re-enable for the SMOG. For some reason, I was not getting a MIL on the dash for the bad O2. When I scanned, I got a P0600 due to sensor inactivity.
I checked to make sure the MIL was enabled for that code and it was.
joecar
May 4th, 2010, 06:02 AM
I had a quick look, and trims and CL seem to be enabled.
LastCall
May 4th, 2010, 03:59 PM
I think the sensor is different between 01 and 04.
At start up, the O2 sensor has activity, but once the exhaust comes up to temparature, it holds .450 mv.
I am getting a code, I think it is P0160 for the O2 sensor I replaced. I guess I will just buy a new one.
Does anyone know which readiness test need to be complete to pass CA smog?
5.7ute
May 4th, 2010, 04:03 PM
From everything I have read, it is not a good idea to splice & solder the wires on an O2 sensor. The reason being that the reference air is actually drawn through the wiring & soldering prevents this from occuring.
joecar
May 4th, 2010, 07:53 PM
+1. That's exactly what the GM Service Manual says.
LastCall
May 5th, 2010, 01:18 AM
From everything I have read, it is not a good idea to splice & solder the wires on an O2 sensor. The reason being that the reference air is actually drawn through the wiring & soldering prevents this from occuring.
Great info...
So I guess that means I have to buy a direct plug in O2 sensor. Most of the sensors available need to be crimped/soldered.
Also, the 01 sensor harness plug was different than the 04 sensor that I had.
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