o2 sensor
Freshman User
Joined: Nov 2002
Posts: 39
Likes: 0
From: Amherst, Wisconsin
o2 sensor
I wonder if that's whats wrong with my truck???
My truck has gotten at the maximum 14.77MPG, & last tank got 12.5MPG, I drove the truck HARDER than that the previous tank & got over 14MPG....
Could the 02 sensor be what is screwed up on my truck?
It has 109,000 miles & I am not sure if it has been replace.
I already had the EGR valve sensor replaced.
The Service Engine light is NOT on, could the 02 sensor still be bad?
If I brought it to my "Local Ford Store" IE: Scaffidi, could they most likely test the sensor on the spot or what?
The truck is pretty peppy now that I reset the ECM/PCM, but the way the original poster is talking if the 02 sensor is bad it would affect performance.
Am I correct to think this?
Please let me know.
Garrett
My truck has gotten at the maximum 14.77MPG, & last tank got 12.5MPG, I drove the truck HARDER than that the previous tank & got over 14MPG....
Could the 02 sensor be what is screwed up on my truck?
It has 109,000 miles & I am not sure if it has been replace.
I already had the EGR valve sensor replaced.
The Service Engine light is NOT on, could the 02 sensor still be bad?
If I brought it to my "Local Ford Store" IE: Scaffidi, could they most likely test the sensor on the spot or what?
The truck is pretty peppy now that I reset the ECM/PCM, but the way the original poster is talking if the 02 sensor is bad it would affect performance.
Am I correct to think this?
Please let me know.
Garrett
Senior User
Joined: May 2002
Posts: 310
Likes: 0
o2 sensor
[updated:LAST EDITED ON 12-Dec-02 AT 01:14 PM (EST)]Silver Streak
Like I said before this works on my 96'...I can't say for other vehicle's. It's cleared the codes on my truck every time after I have fixed the problem same with my neighbors 96. And if you noticed in the Post of me asking them how to properly do it I stated for my 96' F150 and they gave me an answere for my 96 F150...not all of OBD-II in general.
As for the 2 guy's who replied I know PKRWUD personaly and run's his own shop and is very knowledgable when it come's to the F150 or any other vehicle for that matter...and as for StangeRanger I shouldn't have to say anything...he's a wizard when it come's to the F150, he's on every F150 site I'm at and I only see him sharing his knowledge with others. From what I have seen he's extremely knowledgable with the F150 and the 4.9L and his truck has the OBD-II PCM.
But I still only hear of the 97+ F150 owners doing this also, this is the first I have ever heard of using a scanner to clear the codes....on all the ford truck site's I go to and start a topic on how to reset the OBD-II PCM everyone responds with the headlight/battery response.
Like I said before this works on my 96'...I can't say for other vehicle's. It's cleared the codes on my truck every time after I have fixed the problem same with my neighbors 96. And if you noticed in the Post of me asking them how to properly do it I stated for my 96' F150 and they gave me an answere for my 96 F150...not all of OBD-II in general.
As for the 2 guy's who replied I know PKRWUD personaly and run's his own shop and is very knowledgable when it come's to the F150 or any other vehicle for that matter...and as for StangeRanger I shouldn't have to say anything...he's a wizard when it come's to the F150, he's on every F150 site I'm at and I only see him sharing his knowledge with others. From what I have seen he's extremely knowledgable with the F150 and the 4.9L and his truck has the OBD-II PCM.
But I still only hear of the 97+ F150 owners doing this also, this is the first I have ever heard of using a scanner to clear the codes....on all the ford truck site's I go to and start a topic on how to reset the OBD-II PCM everyone responds with the headlight/battery response.
New User
Joined: Dec 2002
Posts: 4
Likes: 0
From: Prattsburgh usa
o2 sensor
Remember one thing coolant can kill an o2 sensor. But anyway an o2 sensor can really screw up gas milage if it is reading lean your injectors will kick on longer. Which obviously make gas milage suck and rob power. And usually when a o2 goes it reads lean. Also if you have ever ran an engine really rich it will melt down your cat. Such as ever having a plug wire off for a while. Also check and see if you egr is working properly.
Senior User
Joined: Jan 2002
Posts: 112
Likes: 1
From: Ventura, California
o2 sensor
Gentlemen. My name is Chris. I am 36, and I own and operate a repair business in Ventura, California. I have been operating with the blessing of the city for 5 years, and at least that long before I had to get a business license. I am ASE certified in Engine Repair, Engine Performance, and Automotive Electrical/Electronic Systems (A1, A6, & A8), and have been for 8 years. I worked for Bill Elliott in 1998, and have been part of the crew for Jim Porter Racing, the 2001 VRA Sr. Sprint Car Champs, for the past 3 years
BFD, right? Right (that's what I would have said).
Anyway, I frequent a few message boards simply because I enjoy helping people that are willing to get dirty themselves, and don't simply expect me to give them all the answers, without some work on their part ("My car runs funny, what's wrong?" God, I hate those). I don't claim to know everything, or to always be right, but I won't post something unless I know it's accurate. If it involves speculation, I make that clear as well.
As far as resetting the ECM in OBDII, I prefer to use my OTC Mindreader, but since most of the people that are asking for help can't afford one, I explain to them the battery cable/light switch method. I have personally used this on a 2000 F150 4.6L, and a 1994 Thunderbird 4.6L, within the past 5 weeks. Both times, disconnecting the negative battery cable, and then turning on the headlight switch for 10 minutes, cleared the codes that had been stored. I will not claim that this method will work everytime for every vehicle, but I am yet to see it not work.
It is important to note that this procedure should also be performed when ever installing a new sensor or device that is read or controlled by the ECM, and must always be followed by a relearn.
FWIW, I have been told that simply disconnecting either battery cable, and touching the other cable with it, will do the same thing in a fraction of the time, but that sounds to cheesy for me to try, and too risky for me to recommend.
Take care,
~Chris
BFD, right? Right (that's what I would have said).
Anyway, I frequent a few message boards simply because I enjoy helping people that are willing to get dirty themselves, and don't simply expect me to give them all the answers, without some work on their part ("My car runs funny, what's wrong?" God, I hate those). I don't claim to know everything, or to always be right, but I won't post something unless I know it's accurate. If it involves speculation, I make that clear as well.
As far as resetting the ECM in OBDII, I prefer to use my OTC Mindreader, but since most of the people that are asking for help can't afford one, I explain to them the battery cable/light switch method. I have personally used this on a 2000 F150 4.6L, and a 1994 Thunderbird 4.6L, within the past 5 weeks. Both times, disconnecting the negative battery cable, and then turning on the headlight switch for 10 minutes, cleared the codes that had been stored. I will not claim that this method will work everytime for every vehicle, but I am yet to see it not work.
It is important to note that this procedure should also be performed when ever installing a new sensor or device that is read or controlled by the ECM, and must always be followed by a relearn.
FWIW, I have been told that simply disconnecting either battery cable, and touching the other cable with it, will do the same thing in a fraction of the time, but that sounds to cheesy for me to try, and too risky for me to recommend.
Take care,
~Chris
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