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Failed emissions. No codes

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Old Aug 16, 2020 | 02:44 PM
  #11  
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Originally Posted by Darrenh66
I mentioned this issue to a someone I know who does inspections here in MA. He’s seen the issue frequently and recommend that you check your battery?
It could be caused by a weak battery? He’s seen it even when the battery has been replaced, but found to be defective when tested.
Your friend in MA is aware of at least one of the possible contributors to this occurrence, I was going to ask the OP about the age and (verified!) condition of his battery.



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Old Aug 16, 2020 | 02:45 PM
  #12  
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Originally Posted by Darrenh66
I mentioned this issue to a someone I know who does inspections here in MA. He’s seen the issue frequently and recommend that you check your battery?
It could be caused by a weak battery? He’s seen it even when the battery has been replaced, but found to be defective when tested.
I had the battery and alternator checked and they were fine as well. The battery was replaced just over a year ago.
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Old Aug 16, 2020 | 02:47 PM
  #13  
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The condition of the battery according to my computer and Autozone is satisfactory. Also, the drive cycle(s) that I had went through are on my phone, which I do not have right now because it is being repaired. I found one from a website titled obdii.com or something of the sort. However, even after putting now nearly 1,000 miles on my truck doing all types of driving, they should have reset regardless.
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Old Aug 16, 2020 | 03:03 PM
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You need to get torque pro and see if you are going into closed loop . See if o2 's are switching . Cat temps etc . Definitely need to view the fuel cycle . Are the fuel trims within 10 of each other ,short term-long term .Heaters may not be working on o2's. You could have vacuum leaks etc . It may need throttle body cleaned , could be leaking injectors . Torque pro 5$ app /android phone /cheap blue tooth reader from amazon .If short term going negative its reducing fuel ,if positive its adding fuel . If its not going into closed loop it will never settle down and bring long terms in line .
You should have good oem plugs ,new boots , plugs torqued in 25 to 28 foot pounds . And that plug job should be hospital clean . No anti freeze /oil etc in wells . With out a really good plug job you will be chasing your tail . Look at test results it will tell you if you have raw computer counts coming up on each cly towards setting a code. Fords threshold is quite high . You can get zero counts if done right . Off brand cops not good . Clean all terminals on cops real good . All connectors must lock on or replace ,solder in only . Without a good reader you are like a soldier going to war without a weapon .
Torque pro will tell you whats not completing . Evap codes etc . drive cycle . You can get freeze shots and post them on here .
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Old Aug 16, 2020 | 03:03 PM
  #15  
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Here is the Ford-specific procedure that is in the factory service manual. It is prescribed for verifying repairs.

Note: You have to follow it EXACTLY. Good luck....


Attached Files
File Type: pdf
Ford OBDII Drive Cycle -2004.pdf (362.2 KB, 490 views)
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Old Aug 16, 2020 | 03:17 PM
  #16  
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Originally Posted by redfishtd
You need to get torque pro and see if you are going into closed loop . See if o2 's are switching . Cat temps etc . Definitely need to view the fuel cycle . Are the fuel trims within 10 of each other ,short term-long term .Heaters may not be working on o2's. You could have vacuum leaks etc . It may need throttle body cleaned , could be leaking injectors . Torque pro 5$ app /android phone /cheap blue tooth reader from amazon .If short term going negative its reducing fuel ,if positive its adding fuel . If its not going into closed loop it will never settle down and bring long terms in line .
You should have good oem plugs ,new boots , plugs torqued in 25 to 28 foot pounds . And that plug job should be hospital clean . No anti freeze /oil etc in wells . With out a really good plug job you will be chasing your tail . Look at test results it will tell you if you have raw computer counts coming up on each cly towards setting a code. Fords threshold is quite high . You can get zero counts if done right . Off brand cops not good . Clean all terminals on cops real good . All connectors must lock on or replace ,solder in only . Without a good reader you are like a soldier going to war without a weapon .
Torque pro will tell you whats not completing . Evap codes etc . drive cycle . You can get freeze shots and post them on here .


Thank you, this was more of what I was looking for. I will begin looking into this.
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Old Aug 16, 2020 | 05:46 PM
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My 04 sets all of the readiness items within around 20 miles of normal trips except for the EVAP one. Just another data point. I didn't follow any procedure I just noticed it when I was trying to find misfires that they were all ready except EVAP after I had my battery disconnected and had been driving around testing out my new ac compressor.
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Old Aug 16, 2020 | 06:20 PM
  #18  
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Originally Posted by needsmoarturbo
My 04 sets all of the readiness items within around 20 miles of normal trips except for the EVAP one. Just another data point. I didn't follow any procedure I just noticed it when I was trying to find misfires that they were all ready except EVAP after I had my battery disconnected and had been driving around testing out my new ac compressor.
Sounds about right, heard the same from a friend who also has an 04'. Shouldn't be a drive cycle issue after almost now 1,000 miles.
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Old Aug 16, 2020 | 11:44 PM
  #19  
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Originally Posted by Cadehowell
Sounds about right, heard the same from a friend who also has an 04'. Shouldn't be a drive cycle issue after almost now 1,000 miles.
After replacing the battery - or resetting codes via OBDII, there are lots of things that has to happen.

It is not a "drive cycle" issue. It is a "Trip" issue. It takes a complete "Trip" (which occurs upon successfully completing all OBDII monitors one time) and you could do 10,000 miles without a successful "Trip" depending on your driving habits. There are several (about 9) continuous diagnostic tests the OBDII PCM runs constantly. Many are restarted each "drive cycle" (ie Misfire Monitor), and some span drive cycles (ie: CAT Stat). The EVAP test will not start AT ALL if Intake Air Temp is > 90 degrees, so it can be VERY tough in the middle of the summer. Also if fuel level is less than, or drops below 15%, and when speed drops below 40mph, the EVAP test is cancelled. The 'misfire monitor' (MisStat) will not start until the Misfire Profile is learned in keep alive memory (verification of crankshaft tone ring imperfections are corrected for) --- this one requires THREE 'fuel cutoff decelerations from 60 mph to below 40mph /// without touching the brake /// for the PCM to learn exactly WHAT represents a misfire effect on crankshaft rotational speed change equating to a misfire. After that the Misfire Status test begins to operate normally. And there are MORE little details that WE 'oblivious' drivers never think about.

You can actually 'watch' these PCM tests complete with the App suggested by @redfishtd Torque Pro. If you get set up with Torque Pro, you can download the custom PIDs via the CSV file and set up gauges like those shown in this post: https://www.f150forum.com/f4/how-use...-truck-432417/

Notice when I took the screen shot for this dashboard, my truck had registered over 3000 drive cycles and only 83 trips. A drive cycle only takes 'turning on the key, putting it in gear, and moving about 150 feet'.
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Old Aug 17, 2020 | 06:09 PM
  #20  
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Originally Posted by F150Torqued
After replacing the battery - or resetting codes via OBDII, there are lots of things that has to happen.

It is not a "drive cycle" issue. It is a "Trip" issue. It takes a complete "Trip" (which occurs upon successfully completing all OBDII monitors one time) and you could do 10,000 miles without a successful "Trip" depending on your driving habits. There are several (about 9) continuous diagnostic tests the OBDII PCM runs constantly. Many are restarted each "drive cycle" (ie Misfire Monitor), and some span drive cycles (ie: CAT Stat). The EVAP test will not start AT ALL if Intake Air Temp is > 90 degrees, so it can be VERY tough in the middle of the summer. Also if fuel level is less than, or drops below 15%, and when speed drops below 40mph, the EVAP test is cancelled. The 'misfire monitor' (MisStat) will not start until the Misfire Profile is learned in keep alive memory (verification of crankshaft tone ring imperfections are corrected for) --- this one requires THREE 'fuel cutoff decelerations from 60 mph to below 40mph /// without touching the brake /// for the PCM to learn exactly WHAT represents a misfire effect on crankshaft rotational speed change equating to a misfire. After that the Misfire Status test begins to operate normally. And there are MORE little details that WE 'oblivious' drivers never think about.

You can actually 'watch' these PCM tests complete with the App suggested by @redfishtd Torque Pro. If you get set up with Torque Pro, you can download the custom PIDs via the CSV file and set up gauges like those shown in this post: https://www.f150forum.com/f4/how-use...-truck-432417/

Notice when I took the screen shot for this dashboard, my truck had registered over 3000 drive cycles and only 83 trips. A drive cycle only takes 'turning on the key, putting it in gear, and moving about 150 feet'.

So I went through and found two codes

P1867 Transfer Case Contact Plate General Circuit Failure
P0622 Generator Field Terminal Circuit

I'm going to take my truck in and see if we can check all of the connections, etc.

EVAP test was a pass
02, Cat, and 02 Htr were failures and the 02 sensors were bouncing back and forth from 0.05 V to around 0.9 V on the graphs.
All temperatures were running at around the right area continuing to lead me to believe that there is a short circuit or faulty connection in one or multiple places, especially considering that literally each of the sensors were replaced just over a year ago.

I downloaded an ios version similar to torquepro with a veepeak obd2 bluetooth reader and it works great. Thank you for the help there!
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