Change O2 sensor question
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Posting Guru
Joined: Jul 2002
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From: East Coast
Change O2 sensor question
I bought a new bosch o2 sensor for my 86 EFI F150. Just a quick question, how often should you change it? They say 25K, but is that just to get you to buy one more often? Will I notice any real mpg or performance increase? Does the battery need to be disconnected and the computer reset, or will it automatically learn the new sensor after a few days of driving? Thanks.
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
25K miles isn't unreasonable. If the sensor is running too lean, it will definately impact the amount of gas you burn. These days, a new O2 sensor can pay for itself real quick. You won't notice a performance increase at all.
As with any sensor replacement, there can be up to a 15% difference between sensors. Disconnecting the battery and allowing the computer to re-learn its sensor characteristics will give you the best results.
As with any sensor replacement, there can be up to a 15% difference between sensors. Disconnecting the battery and allowing the computer to re-learn its sensor characteristics will give you the best results.
Post Fiend
Joined: Mar 2003
Posts: 14,413
Likes: 3
From: Sarnia, Ontario, CANADA!
Originally Posted by nickmobile67
I figured after 18 years it couldn't hurt to change it, if I can get it out! 
-Matt
