O2 Senser????
New User
Joined: May 2006
Posts: 7
Likes: 0
sorry to steal your thread, but I have a 98 5.4L and my check engine light came on, and got the codes read, and am going to replace my o2 sensors. Well I bought 2 of the bosch o2 sensors, and I got underneath it and found 4, 2 right after the manifolds, and 2 after the cats. I figured the main ones are the ones after the manifolds, but what do the other 2 do?? And do I need to replace them as well??
I did some searching on this forum and found this post...
"The pre-cat sensor is used to adjust the fuel trim, the post-cat is used to simply monitor the cat efficiency, correct?"
Also I know they come in different wire lengths, but are they all the same besides the lengths of the wires??
Thanks
I did some searching on this forum and found this post...
"The pre-cat sensor is used to adjust the fuel trim, the post-cat is used to simply monitor the cat efficiency, correct?"
Also I know they come in different wire lengths, but are they all the same besides the lengths of the wires??
Thanks
Senior User
Joined: Feb 2004
Posts: 163
Likes: 0
From: Columbia, SC
Trending Topics
New User
Joined: May 2006
Posts: 7
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
12secondstang
1987 - 1996 F150 & Larger F-Series Trucks
3
May 8, 2007 01:40 PM