E4OD Shifting Characteristics Question
Thread Starter
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Senior User
Joined: Mar 2020
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From: Lodi, Ca
I think I'm confused.
I jumped the wires to get the codes through the CEL. I have seen instructions for the engine on test, but I am not familiar with the KOEO (engine off) "Test". I just read the codes.
So my 335 code is an active issue rather than a stored code? This is where I am confused between the two.
Dan
I jumped the wires to get the codes through the CEL. I have seen instructions for the engine on test, but I am not familiar with the KOEO (engine off) "Test". I just read the codes.
So my 335 code is an active issue rather than a stored code? This is where I am confused between the two.
Dan
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
There are two parts to running the engine off tests. The first is the Key On Engine Off (KOEO) tests. Various sensors are tested during this portion. If anything is flagged as out of specification you will get the code flashed that represents what is out of spec. If there is nothing flagged you will get System Pass Code 111. When the KOEO tests and results are flashed out the computer will send a separator flash indicating the Stored Codes will be flashed out next.Some code readers interpret the separator flash as Code 10, which is wrong. If there are any Stored Codes in Continuous Memory they will be flashed out. If there are no Stored Codes the computer will display System Pass Code 111.
Code 335 is a Key On Engine Off (KOEO) code. Yes it is an active issue.
Code 335 is a Key On Engine Off (KOEO) code. Yes it is an active issue.
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 20
From: Caracas, Venezuela
Hello Dan, the guys have been plenty helpful I've seen. Regarding the jumpy speedo, it's probably the tone ring inside the rear differential, it must have a broken or missing tooth (usually happens when the rear gear breaks, and with 240k miles it has probably happened at least once). Replacing it is an involved work, that will require you to remove the rear gear (or maybe filling and creating a new tooth). Since the transmission has been shifting fine, if you can ignore the jumpy speedo I would let it be. That's what I did with mine, I bought the tone ring, but except for a little jumpy speedo the truck worked just fine. If I ever replace the rear gearing, that will be added to the tasks.
Thread Starter
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Senior User
Joined: Mar 2020
Posts: 159
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From: Lodi, Ca
There are two parts to running the engine off tests. The first is the Key On Engine Off (KOEO) tests. Various sensors are tested during this portion. If anything is flagged as out of specification you will get the code flashed that represents what is out of spec. If there is nothing flagged you will get System Pass Code 111. When the KOEO tests and results are flashed out the computer will send a separator flash indicating the Stored Codes will be flashed out next.Some code readers interpret the separator flash as Code 10, which is wrong. If there are any Stored Codes in Continuous Memory they will be flashed out. If there are no Stored Codes the computer will display System Pass Code 111.
Code 335 is a Key On Engine Off (KOEO) code. Yes it is an active issue.
Code 335 is a Key On Engine Off (KOEO) code. Yes it is an active issue.
Now I got it! Thanks for the explanation! Except now i need to figure out my code 335 issue😥!
Dan
Thread Starter
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Senior User
Joined: Mar 2020
Posts: 159
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From: Lodi, Ca
Hello Dan, the guys have been plenty helpful I've seen. Regarding the jumpy speedo, it's probably the tone ring inside the rear differential, it must have a broken or missing tooth (usually happens when the rear gear breaks, and with 240k miles it has probably happened at least once). Replacing it is an involved work, that will require you to remove the rear gear (or maybe filling and creating a new tooth). Since the transmission has been shifting fine, if you can ignore the jumpy speedo I would let it be. That's what I did with mine, I bought the tone ring, but except for a little jumpy speedo the truck worked just fine. If I ever replace the rear gearing, that will be added to the tasks.
I also think I may need to tear down the rear end, (I've done several on Jeeps, including gears and lockers, etc...) and I can tell it's been tore down in the recent past...really the only work that I can tell has been done except for some suspension components...
Two problems with letting it be...1) I can't use cruise control. The jumping isn't bad, just enough to screw with the CC working properly... and 2) I'm kinda OCD about anything not working properly. I just hate it. Same thing on my boat..,it can be oblem but everything has to work right or my brain kinda quivers...😂🤣😂.
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Senior User
Joined: Mar 2020
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From: Lodi, Ca
Quick Update
Well my Motorcraft VSS showed up today. After trying TWO aftermarket VSS from Oreillys, I installed the Motorcraft unit and it works perfect! Speedo issues resolved and I'm thinking my shifting issues were related to a bad-outta-the-box aftermarket VSS.
Thanks for all the feedback...I learned a few things...now on to my code 335 issue🤔...
Dan
Thanks for all the feedback...I learned a few things...now on to my code 335 issue🤔...
Dan
Thread Starter
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Senior User
Joined: Mar 2020
Posts: 159
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From: Lodi, Ca
what's the downside if this isn't resolved? This is a California truck so i understand the sensor is a little different...
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Fleet Owner
Joined: Oct 2005
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From: Kentucky
Your truck uses the later version of EGR feedback, DPFE. It measures actual flow.
The older style EGR Valve Position (EVP) feedback uses a gray EVP sensor on top of the EGR valve. That's what I was referring to.
Two very different feedback techniques.
Since the truck is not running for the KOEO tests and the triggered code is Code 335 I would assume the sensor output may be bad or perhaps the aftermarket sensor uses a different wiring scheme?
The older style EGR Valve Position (EVP) feedback uses a gray EVP sensor on top of the EGR valve. That's what I was referring to.
Two very different feedback techniques.
Since the truck is not running for the KOEO tests and the triggered code is Code 335 I would assume the sensor output may be bad or perhaps the aftermarket sensor uses a different wiring scheme?
Thread Starter
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Senior User
Joined: Mar 2020
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From: Lodi, Ca
I've had feedback from others that the wiring is the same, but Ford in their infinite wisdom, liked to change the details in the shape of the plugs.
if left alone, is there some downside? Does it matter Since there are no symptoms or codes? It passes smog fine...
if left alone, is there some downside? Does it matter Since there are no symptoms or codes? It passes smog fine...
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