92 4.0 Ranger O2 Sensor Location


Deppdog

15+ Year Member

Joined
Dec 23, 2007
Messages
13
Points
3,101
Vehicle Year
1992
Transmission
Automatic
From what I have read, it sounds like there should be 2 Oxygen Sensors on my 92 Ranger with a 4.0. I can only find one...just right before the dual cats (upstream). I have looked everywhere along the exhaust and that's all I can find. I checked both manifolds and the Y pipe that comes off the manifolds and connects to the cats...that's it...one! Any ideas? I appreciate the help!!! Also, if anyone has the part number(s) for the sensor or sensors I have, I would greatly appreciate it!

Thanks!
Steve D
 
Its only got 1 heater oxygen sensor. Same as my 91 only has 1, just before the cats.
 
90-92 NON-Cali have only a single HEGO in the Y-pipe.

ALL 1993's (and 1994's) have dual-HEGOs one in each downpipe.

all '95-up have THREE (a cat monitor behind the cat)

AD
 
Thanks to all who answered!!! I appreciate the help!!!
 
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