V-10 throttle response **Update**
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Senior User
Joined: Oct 2005
Posts: 171
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V-10 throttle response **Update**
As i said in the original post, I cleaned the MAF sensor a few weeks ago and that seemed to bring back some throttle response.
This past Monday I got into the truck and the 'Service Engine Soon' light came on as soon as i fired it up. Uh-Oh. First thing i thought of - the MAF is now acting up. Drove it carefully to work, called Ford. They are closing early for the Holiday, so after work I went to AutoZone to use one of their scanners.
Code = P0153
CKT Slow Response O2 Sensor, Bank 2, Sensor 1 (Drivers side exhaust manifold)
I cleared the code and figure that if i see it again I'll go ahead and replace the O2 sensor. Well, ever since that the truck has really come to life. I guess clearing the code must have performed some sort of reset to the ECU.
Just thought I'd pass the info.
This past Monday I got into the truck and the 'Service Engine Soon' light came on as soon as i fired it up. Uh-Oh. First thing i thought of - the MAF is now acting up. Drove it carefully to work, called Ford. They are closing early for the Holiday, so after work I went to AutoZone to use one of their scanners.
Code = P0153
CKT Slow Response O2 Sensor, Bank 2, Sensor 1 (Drivers side exhaust manifold)
I cleared the code and figure that if i see it again I'll go ahead and replace the O2 sensor. Well, ever since that the truck has really come to life. I guess clearing the code must have performed some sort of reset to the ECU.
Just thought I'd pass the info.
Guest
Joined: Nov 2004
Posts: 7,988
Likes: 55
From: north west new jersey
could very well be a senser failing .esp. with a 99.
i did a check in motorcraft and found NO tsb's for the pcm throwing that as a false code .so if it comes back you know why. and when a pcm logs a code it also throws the motor into a limp mode till it's cleared or gets repaired. a limited power mode as you found out. when cleared it's fine.
i did a check in motorcraft and found NO tsb's for the pcm throwing that as a false code .so if it comes back you know why. and when a pcm logs a code it also throws the motor into a limp mode till it's cleared or gets repaired. a limited power mode as you found out. when cleared it's fine.
Post Fiend
Joined: Jan 2002
Posts: 5,859
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From: USA
Gee ,if you go back to his orignal post about this! you will see someone recommended o2 sensors as a problem.
"walks away with a smile " dang Capt we're good ,your the old geezer, I'm the young one ,but still retired.
Rich
"walks away with a smile " dang Capt we're good ,your the old geezer, I'm the young one ,but still retired.
Rich
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Senior User
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Boy o boy you guys like to read too much into a post and then pat yourselves on the back!
1. The code has not returned. There is a such thing as the ECU throwing false codes. Rare, but I've seen it plenty of times. Just becasue there isn't a TSB, doesn't mean it doesn't happen.
2. Truck never went into limp mode. It ran fine, except for the slight lack of off-idle oompf that my original post stated.
3. Due to #1, it has always been my policy that if the vehicle runs fine during the thrown code and after clearing it, the part does not need replacing unless the code gets tossed the second time.
Damn I'm good. Cleared the code, added driveability to my truck, and did it for free. Total savings = a $50 part, plus labor charges.
1. The code has not returned. There is a such thing as the ECU throwing false codes. Rare, but I've seen it plenty of times. Just becasue there isn't a TSB, doesn't mean it doesn't happen.
2. Truck never went into limp mode. It ran fine, except for the slight lack of off-idle oompf that my original post stated.
3. Due to #1, it has always been my policy that if the vehicle runs fine during the thrown code and after clearing it, the part does not need replacing unless the code gets tossed the second time.
Damn I'm good. Cleared the code, added driveability to my truck, and did it for free. Total savings = a $50 part, plus labor charges.
Guest
Joined: Nov 2004
Posts: 7,988
Likes: 55
From: north west new jersey
many times ford will post a tsb when a code problem is found to be false just as they did for mine. for your s i checked and read every tsb for a gas motor none came up. chances are a false code as i said if it come back you know it is what the code means .
also the off idle problem you felt is what happens when a code is loged . thats a limp mode to make you aware of a problem.
really its a all around win.
also the off idle problem you felt is what happens when a code is loged . thats a limp mode to make you aware of a problem.
really its a all around win.
Post Fiend
Joined: Jan 2002
Posts: 5,859
Likes: 7
From: USA
Pmdracer ,my post was a joke ,not intended to cause a problem with anyone.
OBDII is not failsafe in any way. Codes don't always point in the right direction when trouble shooting problems.
I have been fooled by many times in the past !
Be the first to say it.
With todays fuel /engines and people not doing tune ups properly or often enough ,because of 100,0000 mile words in manuals.
performace problems like yours pop up all the time.
In the last couple of yrs ,I've seen alot of o2 sensors failing in older ,high mileage vehicles. Not so much a total failure but a slow reading or low voltage feedback to the pcm.
Because thay are contaminated with carbon or soot .
o2's are a tuneup part in my own shop at 100,000 mile and above now unless I see
them acting slow sooner than that.
good luck with your vehicle!
Capt ,your still the old geezer !
turning 60 huh!
Rich
OBDII is not failsafe in any way. Codes don't always point in the right direction when trouble shooting problems.
I have been fooled by many times in the past !
Be the first to say it.
With todays fuel /engines and people not doing tune ups properly or often enough ,because of 100,0000 mile words in manuals.
performace problems like yours pop up all the time.
In the last couple of yrs ,I've seen alot of o2 sensors failing in older ,high mileage vehicles. Not so much a total failure but a slow reading or low voltage feedback to the pcm.
Because thay are contaminated with carbon or soot .
o2's are a tuneup part in my own shop at 100,000 mile and above now unless I see
them acting slow sooner than that.
good luck with your vehicle!
Capt ,your still the old geezer !
turning 60 huh!
Rich
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Guest
Joined: Nov 2004
Posts: 7,988
Likes: 55
From: north west new jersey
yes on oct 13th rich. and i agree with you 100% as i also found the same problems thats why as i still can till april 2nd . when my motor craft subscription fexpirers. i went and researched the tsb's for his profiled 1999, as a personal favor for a fellow fte member and found none about the pcm throwing a false code with that number.
sorry my trying to help you out!insulted you pmdracer
sorry my trying to help you out!insulted you pmdracer
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Guest
Joined: Nov 2004
Posts: 7,988
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From: north west new jersey
forty and i are old time ford techs .as such we sometimes do read ahead or go out of the way to help fellow fte'rs. i did a search just be sure NO tsbs were out or were out that could help you out.
a slow o2s means the heater section is lowly failing. your's is still working. your happy rigtr now .but at the same time we helped you to understand IF "that big 2 lettered word" it happens again with the same code you know what you need to do.
best wish man! hope you understand this old fart a little better. i'm more like a old boy scout trying to help out. just so i don't wind up 6 feet under with every thing i learned over the last 42 years .
a slow o2s means the heater section is lowly failing. your's is still working. your happy rigtr now .but at the same time we helped you to understand IF "that big 2 lettered word" it happens again with the same code you know what you need to do.
best wish man! hope you understand this old fart a little better. i'm more like a old boy scout trying to help out. just so i don't wind up 6 feet under with every thing i learned over the last 42 years .
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
Charlie and Rich seem to have everyone's backs... makes me jealous at times 
If you get the code back, swap O2 sensors side-to-side if you are cheap like me (well, I wasn't until I was unemployed by choice).
Clear the computer and see if the code comes back but on the other bank. If so, you know what to do
If you get the code back, swap O2 sensors side-to-side if you are cheap like me (well, I wasn't until I was unemployed by choice).
Clear the computer and see if the code comes back but on the other bank. If so, you know what to do
Guest
Joined: Nov 2004
Posts: 7,988
Likes: 55
From: north west new jersey
good thought art. i am the other way .why do the work 2 times. but i fully under stand your problem. been there to many times myself. and a socail security check sure dosn't cut it now. but i'm still under warrenty for another 15k and at 12 miles a day it should last longer then when i went over 100 a day to work and back.
guess you have me thinking about later on right now. very right fully so. thanks for the brain restart art.
guess you have me thinking about later on right now. very right fully so. thanks for the brain restart art.