O2 sensor replacement
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New User
Joined: Jan 2003
Posts: 2
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From: Denver
O2 sensor replacement
Alright, I have a 96 F-250 with a 351 the first long trip I took with the truck the check engine light pops on when I had the light checked the computer told me the left O2 sensor is bad. Great now where is the dang thing. I have a feeling that the right sensor is the one on the exhaust just before the catalytic converter. Am I wrong??
Mileage is starting to get bad so I want to see if replacing the O2 will help.
Mileage is starting to get bad so I want to see if replacing the O2 will help.
Elder User
Joined: Dec 2002
Posts: 608
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From: TAOS NM
O2 sensor replacement
the o2 sensor on my 1991 f-150 351 windsor is located just in front of the cats , you have the the pipes comming from the right and left o your mani forming a funny (Y) THEN RIGHT WHERE THESE TWO PIPES ENTER THE CAT IS AN OBJECT SHAPED LIKE A CARROT WITH A PIG TAIL WITH TWO WIRES AND A PLUG .
HOPE THIS HELPS
HOPE THIS HELPS
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
O2 sensor replacement
If you have the money you might want to replace them all while you have the tools. You need a special 02 sensor socket, a wrench won't work. Autozone will rent them out according to their website.
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.
Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
O2 sensor replacement
[updated:LAST EDITED ON 02-Jan-03 AT 01:28 PM (EST)]I don't know what the difference is between his 3 O2 sensors and my one, but a regular wrench works fine for mine (I remember it being a 7/8 inch).
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
O2 sensor replacement
The new sensor probably already has it, but be sure to put some antisieze on it.
Some O2 sensors can be removed with an open end wrench. Take a look before working on it, or like the guys said some shops will loan or rent you a wrench.
Good Luck,
Jim Henderson
Some O2 sensors can be removed with an open end wrench. Take a look before working on it, or like the guys said some shops will loan or rent you a wrench.
Good Luck,
Jim Henderson
Senior User
Joined: Feb 2002
Posts: 155
Likes: 0
From: OAK CREEK USA
O2 sensor replacement
I replaced the bank 1 (spark plug #1 side)O2 sensor on my 1996 F150.
Auto zone, ran the trouble codes for me (no cost), sold me the new O2 sensor($40), and let me use the wrench for the night (no cost).
I ended up using a 1/2" ratchet wrench with a 3 foot pipe on it, with a swivle down near the special O2 sensor wrench.
I sprayed pb blaster penetrating oil on it first.
After I replaced it, the Check engine light stopped coming on.
There was antisieze compound that came along with the new O2 sensor.
Gene
Auto zone, ran the trouble codes for me (no cost), sold me the new O2 sensor($40), and let me use the wrench for the night (no cost).
I ended up using a 1/2" ratchet wrench with a 3 foot pipe on it, with a swivle down near the special O2 sensor wrench.
I sprayed pb blaster penetrating oil on it first.
After I replaced it, the Check engine light stopped coming on.
There was antisieze compound that came along with the new O2 sensor.
Gene
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
O2 sensor replacement
I tried using a wrench on mine but it wasn't the correct size whether it was metric or standard, so it would slip. They sometimes are a real PITA to get off, so the special wrench is usually required so you can put the torque to all corners, not just 2 sides like an open end wrench.
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds .
Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Justin - One Happy FTE Member
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Freshman User
Joined: Dec 2002
Posts: 29
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O2 sensor replacement
My '96 has three O2 sensors, two upstream(before Cat) and one down stream. The upstream sensors go out of range most often. Make sure to check the calibration code on drivers door jam. Code should be something like 6-64E-R11. This will determine which O2 units you will need, replace both upstram sensors , dont waste your time with one at atime. The Ford P/n is F88Z9F472AA, this will help NAPA (or whomever)
xref the part. Make sure to warm the engine so you can backoff the plug, more is not better when it comes to removing the O2 sensors, EASY!
Wide OPen until you see GOD then Brake,
Turn 8 Road America
xref the part. Make sure to warm the engine so you can backoff the plug, more is not better when it comes to removing the O2 sensors, EASY!
Wide OPen until you see GOD then Brake,
Turn 8 Road America
Lead Driver
Joined: Feb 2000
Posts: 5,373
Likes: 46
From: Palm Bay, Florida
O2 sensor replacement
Does anything else but the check engine light coming on give a reason to change the 02 sensor(s)?? I've heard that mileage is a clue, my '94 F150 302 has just under 80k on it.
Post Fiend
Joined: Jun 2001
Posts: 5,228
Likes: 5
From: Running Springs CA
O2 sensor replacement
They do not "wear out" like a sparkplug. Bosch has tried to perpetuate the myth that you need to replace them with every tuneup. That is just to make a lot of money on expensive replacements. If there is no error code, the sensor is just fine. If your MAF or Speed-Density setup is working perfectly, the o2 doesn't have to do anything. It is there to provide feedback and "fine-tune" the mixture.
Three sensors on the OBD-II equipped '96! That could get expensive.
Jim
Three sensors on the OBD-II equipped '96! That could get expensive.
Jim
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