O2 Sensor locations
#1
04-05-2019, 07:19 AM
O2 Sensor locations
I have a 1996 Ford Ranger 4.0L, V6 4x2WD and have an OBDII code for bad o2 Sensors.
Since being a 'newbie at mechanical engineering', I don't know the location of these 3 sensors.
Can someone send me a diagram or picture of where and what to look for please. Also, do I
use a wrench, socket or what? Thanks for everyone who reads and responds to this post.
Since being a 'newbie at mechanical engineering', I don't know the location of these 3 sensors.
Can someone send me a diagram or picture of where and what to look for please. Also, do I
use a wrench, socket or what? Thanks for everyone who reads and responds to this post.
#2
04-05-2019, 11:59 AM
Do you know the DTC retrieved?
O2’s,, good ones,, are replaced quite often. There are many things/conditions that can add to a invalid code. Having the code/s helps with a direction to move..
O2s are easy to spot in the exhaust, both before and after cat.
Sometimes you can remove a sensor with a wrench, but there’s a special 6 point socket that has a long cut away side or window that allows for the sensors harness to exit through. The sensor connector is generally to large to pass through a wrenches box end, and most times to hard to get a wrench into tight access areas...
O2’s,, good ones,, are replaced quite often. There are many things/conditions that can add to a invalid code. Having the code/s helps with a direction to move..
O2s are easy to spot in the exhaust, both before and after cat.
Sometimes you can remove a sensor with a wrench, but there’s a special 6 point socket that has a long cut away side or window that allows for the sensors harness to exit through. The sensor connector is generally to large to pass through a wrenches box end, and most times to hard to get a wrench into tight access areas...
#4
06-09-2019, 01:14 PM
O2 sensor location by OBC code
There are two things that can be interpreted from the OBC code. Type of failure and which sensor.
Type of failures - Off top of my head there is heater malfunction, too low voltage, too high voltage, etc. In most cases the fix is to just replace the sensor.
Which sensor - They are defined by Bank and Sensor number.
Bank 1 - the bank where first cylinder is. On your engine Bank 1 is on the right (passenger side).
Sensor 1 is upstream (before the catalytic converter).
Sensor 2 is downstream (after the converter).
Bank 1 Sensor 1 and Bank 2 Sensor 1 are hard to get to. They are on the exhaust manifolds in the engine compartment.
Bank 1 Sensor 2 is easy to get to. It's on the top of exhaust pipe after the converter. You may have to spray with a nut breaker spray - PB Blaster is popular. I used PB Blaster and let it set a few hours and used a small hammer on an open-end wrench.
An old oil field trick is to use PAM cooking spray (canola oil) to break free nuts.
Bank 2 Sensor 2 - this applies only to dual exhausts with two converters. The 4.0 L has a "Y" after the two exhaust manifolds feeding the one converter, so you won't see a Bank 2 Sensor 2 code.
Type of failures - Off top of my head there is heater malfunction, too low voltage, too high voltage, etc. In most cases the fix is to just replace the sensor.
Which sensor - They are defined by Bank and Sensor number.
Bank 1 - the bank where first cylinder is. On your engine Bank 1 is on the right (passenger side).
Sensor 1 is upstream (before the catalytic converter).
Sensor 2 is downstream (after the converter).
Bank 1 Sensor 1 and Bank 2 Sensor 1 are hard to get to. They are on the exhaust manifolds in the engine compartment.
Bank 1 Sensor 2 is easy to get to. It's on the top of exhaust pipe after the converter. You may have to spray with a nut breaker spray - PB Blaster is popular. I used PB Blaster and let it set a few hours and used a small hammer on an open-end wrench.
An old oil field trick is to use PAM cooking spray (canola oil) to break free nuts.
Bank 2 Sensor 2 - this applies only to dual exhausts with two converters. The 4.0 L has a "Y" after the two exhaust manifolds feeding the one converter, so you won't see a Bank 2 Sensor 2 code.
Last edited by JustinWHT; 06-09-2019 at 01:34 PM. Reason: Typos
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