Sub o2 Sensor (code 27)

[RazoE]

Hey guys, my car keeps pulling up code 27..

It used to display code 26 also, but I changed the oxygen sensor (wire was f-ed)..

I checked the codes, and it says code 27 is the sub-02 sensor..

I know it's a California thing, but I thought my car only had one? Where's the 2nd?

I also searched, but apparently "27" "sub" and "02" are omitted from searches so I needed a new thread...

any help/info's appreciated guys, thanks..


DUH EDIT: forgot about the TSRM


http://www.cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?S=EC&P=3

I'm gonna take a look at it, wish me luck fellas...

 

[RazoE]

okay, well it's a single plug hanging, and I have no idea where it connects to...

on the TSRM it says it connects to the ECU, but the harness isnt long enough, not by a long shot...

 

[f00g00]

Before the cat is where to look. If you don't have original exhaust then you wouldn't have the bung for the second 02 sensor.
pic is right here,
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=EX&P=2

 

[RazoE]

I have the plug and harness for the 2nd O2 sensor, but it is just hanging there. I see no place where it can plug in, and my header/exhaust (save the catback) are original.

 

[Nick M]

If the harness does not reach where the oxygen sensor goes in the header pipe, then it is not original. Or the ECU was changed.

 

[RazoE]

where does the other harness come out from? I'm probably going to the junkyard tomorrow, but usually they're all pre 89's...

if it's the same harness, I can just snatch it, and spice it in...

 

[RazoE]

nope, they're all cut off, since California doesn't sell catalytic converters...


The oxygen sensor has the harness and plug attached, that's not the problem, there's just nowhere to plug it into...

TSRM doesn't help....