Code #72 (KOEO)
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
According to my info that is the correct PCM for a 1994 F250 with 5.8L engine, E4OD transmission and Federal emissions. It's definitely one that will display three digit codes.
The Standard Motor Products cross-reference number is EM1160. Not that I am telling you to go out and purchase one, only a FYI to keep in mind.
The Standard Motor Products cross-reference number is EM1160. Not that I am telling you to go out and purchase one, only a FYI to keep in mind.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
As I recall all 1994 F-series trucks with a 4.9L and standard transmission had the two digit codes.
All others had the three digit code.
What engine and transmission do you have?
If you do not have the 5.8L engine with a E4OD transmission I would check that number on the PCM again.
All others had the three digit code.
What engine and transmission do you have?
If you do not have the 5.8L engine with a E4OD transmission I would check that number on the PCM again.
More Turbo
Joined: Dec 2007
Posts: 641
Likes: 3
From: Umicorn UtopiaFantasyLand
Not trying to hijack, but I have a Sunpro CP9015 code scanner by Actron, Made in USA I bought years ago and never used and need to use it now. Is it as good as the Equus 3145? I have the manual,everything. Just wanted to know the difference between the two,etc. Also, when the scanner checks the codes, will the codes be deleted automatically? I may want to save them until work is done on my engine. Thanks!
Last edited by eagle275; Aug 7, 2013 at 02:41 AM. Reason: add
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
The Sunpro CP9015 is a wast of money. It will not tell you anything that the dash MIL does not already do other than beep. You have to count the flashes on the Sunpro CP9015.
The Equus 3145 has a read out for the code and you do not have to count anything.
Just get rid of the Sunpro CP9015 and buy a Equus 3145.
The codes will remain in the PCM memory unless you erase them for 60 start ups.
The Equus 3145 has a read out for the code and you do not have to count anything.
Just get rid of the Sunpro CP9015 and buy a Equus 3145.
The codes will remain in the PCM memory unless you erase them for 60 start ups.
More Turbo
Joined: Dec 2007
Posts: 641
Likes: 3
From: Umicorn UtopiaFantasyLand
Thanks Subford!
The Sunpro CP9015 is a wast of money. It will not tell you anything that the dash MIL does not already do other than beep. You have to count the flashes on the Sunpro CP9015.
The Equus 3145 has a read out for the code and you do not have to count anything.
Just get rid of the Sunpro CP9015 and buy a Equus 3145.
The codes will remain in the PCM memory unless you erase them for 60 start ups.
The Equus 3145 has a read out for the code and you do not have to count anything.
Just get rid of the Sunpro CP9015 and buy a Equus 3145.
The codes will remain in the PCM memory unless you erase them for 60 start ups.
Thread Starter
|
Junior User
Joined: Nov 1999
Posts: 70
Likes: 0
I finally received my code reader and member rla2005 was right on about the 3 digit code. I guess what happened to me was Murphys Law. Somehow while trying to count the flashes,I missed a digit. The 3 digit code was being displayed but I was not seeing the first flash as part of the code but thought it was part of the test sequence. So my code 72 is really code 172 and it is only in the CM. The KOEO and the KEER test both pass.
I did the counting CEL test about 5 times but simply couldn't get it read correctly. So at least now I have some direction to go with trying to repair this code. Thanks to everyone who tried to help. That's what makes this forum great.
I have done a brief search on code 172 and it appears to be a problematic code that has caused a lot of grief over time. I will try to do some poking around and will replace the almost 20 year old O2 sensor with a new Motorcraft one,check the wiring for abrasions. Then I will clean the MAF sensor and check its wiring as well.I also need to check for vacuum leaks on the intake around the throttle body. Anything else that I should be checking out?
Thanks again
I did the counting CEL test about 5 times but simply couldn't get it read correctly. So at least now I have some direction to go with trying to repair this code. Thanks to everyone who tried to help. That's what makes this forum great.
I have done a brief search on code 172 and it appears to be a problematic code that has caused a lot of grief over time. I will try to do some poking around and will replace the almost 20 year old O2 sensor with a new Motorcraft one,check the wiring for abrasions. Then I will clean the MAF sensor and check its wiring as well.I also need to check for vacuum leaks on the intake around the throttle body. Anything else that I should be checking out?
Thanks again
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Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
I would start with cleaning the MAF and checking for vacuum leaks before changing the O2 sensor. Code 172 is a symptom, not an absolute indication of a bad O2 sensor. I suggest you clear the codes from CM, remove the reader while the codes are displaying. Then drive the truck for a few days to see if 172 comes back again after cleaning the MAF and checking/repairing vacuum leaks.
An exhaust leak upstream of the O2 sensor can also trigger a lean code. Same for missing or leaking AIR system components.
An exhaust leak upstream of the O2 sensor can also trigger a lean code. Same for missing or leaking AIR system components.
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