O2 sensor "not ready"
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5th Wheeling
Joined: Jan 2010
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From: Nor-Cal
O2 sensor "not ready"
I'm having an issue smogging my 01 CCSB 5.4 gasser. I don't have any codes but when I took it to get smogged the tech told me that I had a bad O2 sensor. The readout said O2 sensor "not ready" and O2 heater "not ready" so I bought 2 new O2 sensors and replaced them. I took it back and it still said not ready. Anyone ever had this issue?
Thanks for reading.
Thanks for reading.
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
What were the specific fault codes?
Which specific sensor(s) did you replace? What part number(s)?
Did you reset the computer/ fault codes after the parts swapping exercise?
How far/long did you drive it after the repair before taking it back to the test station?
What state are you in?
Which specific sensor(s) did you replace? What part number(s)?
Did you reset the computer/ fault codes after the parts swapping exercise?
How far/long did you drive it after the repair before taking it back to the test station?
What state are you in?
Senior User
Joined: Jan 2007
Posts: 132
Likes: 2
Don't know the specific required cycles for O2 sensors, but several OBD2 monitored devices require a number of warm up and/or start stop cycles to report ready. I have a older van that took almost a week of occasional driving to report ready on the OBD2.
Thread Starter
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5th Wheeling
Joined: Jan 2010
Posts: 45
Likes: 0
From: Nor-Cal
What were the specific fault codes?
Which specific sensor(s) did you replace? What part number(s)?
Did you reset the computer/ fault codes after the parts swapping exercise?
How far/long did you drive it after the repair before taking it back to the test station?
What state are you in?
Which specific sensor(s) did you replace? What part number(s)?
Did you reset the computer/ fault codes after the parts swapping exercise?
How far/long did you drive it after the repair before taking it back to the test station?
What state are you in?
I replaced both O2 sensors Bosch part #15717.
Yes I reset the computer after installing them.
I've taken it to the smog shop twice and down to my mechanic 3 time to use his obdII reader.
I have driven over 1000 miles since resetting. I've done highway driving(70 mile trip)and in town driving.
I live in California.
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
If you only have a total of two O2 sensors on the whole truck, you'll never get those monitors to set and you're wasting a lot of time and money because you (and your inspection station) don't understand what's going on.
First off, was this truck built to California or Federal emissions specifications? (See sticker under the hood).
First off, was this truck built to California or Federal emissions specifications? (See sticker under the hood).
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5th Wheeling
Joined: Jan 2010
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From: Nor-Cal
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Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
I didn't ask where it was built because that doesn't matter, go back and read the question.
You came here for help. In order to get the help you need, you must answer the very specific questions that are asked with answers that are as specific as possible.
Go look at that sticker and report what it says.
You came here for help. In order to get the help you need, you must answer the very specific questions that are asked with answers that are as specific as possible.
Go look at that sticker and report what it says.
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5th Wheeling
Joined: Jan 2010
Posts: 45
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From: Nor-Cal
Sory about that.
The only sticker I see regarding emissions is says
"Vehice emissions control information
This vehicle conforms to US EPA regulations applicable to 2001 model year new gasoline-fueled heavy-duty vehicles. Evaporative emission family 1FMXEO155BBH is certified to a maximum fuel tank capacity of 44.0 gallons"
The woman I bought the truck from bought it new it Texas then moved here(to California) in 04.
The only sticker I see regarding emissions is says
"Vehice emissions control information
This vehicle conforms to US EPA regulations applicable to 2001 model year new gasoline-fueled heavy-duty vehicles. Evaporative emission family 1FMXEO155BBH is certified to a maximum fuel tank capacity of 44.0 gallons"
The woman I bought the truck from bought it new it Texas then moved here(to California) in 04.
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Good. That was the specific information needed to identify your problem.
You have a "Federal", not a California emissions system. This is not a rare situation.
Go read this thread and the ones linked to inside it.
https://www.ford-trucks.com/forums/1...-to-ready.html Post #14 is the "money shot".
You have a "Federal", not a California emissions system. This is not a rare situation.
Go read this thread and the ones linked to inside it.
https://www.ford-trucks.com/forums/1...-to-ready.html Post #14 is the "money shot".
Hotshot
Joined: Jan 2004
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From: St Louis
FTE Leadership Emeritus
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From: Stephensville WI
Tell us more. What year is your truck? What model? Which engine?
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