Help with EGR code
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5th Wheeling
Joined: Oct 2011
Posts: 33
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Help with EGR code
My 1994 F-150 5.0 has been running like crap lately. The check engine light flashes on and off and the truck loses power and pops through the intake until you floor it and it clears up. For a little while. I was getting a code 33 EGR valve not closing. I tested the valve, solenoid, and sensor and all check out good. I got tired of messing with it so I blocked off the valve with a plate between the valve and the intake. The truck runs great now but I still get a code 33 and the light still comes on at times. I’m wondering if the sensor isn’t going to all the way out when the valve closes. I was thinking of shortening the rod on the valve to make it come all the way down. Anyone have any thing I can try?
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
You truck should display three digit codes. Code "33" is Code 111 System Pass displayed twice. You most likely have stored codes in continuous memory. Be sure to leave the jumper installed until the CM codes are displayed.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
If you remove the jumper before the Key On Engine Off (KOEO) codes and Stored Codes are completely displayed you will erase the Stored Codes.
Install the jumper, turn the key to the Run position. Observe any codes flagged in the Key On Engine Off (KOEO) tests. If the tests passed without issue you will see Code 111 System Pass. There will be a short pause, then a single flash will be displayed. This is called the separator flash that indicates any Stored Codes will be displayed. If there are no stored codes you will see Code 111 System Pass displayed.
Be aware any codes, including System Pass, will be flashed out twice.
Install the jumper, turn the key to the Run position. Observe any codes flagged in the Key On Engine Off (KOEO) tests. If the tests passed without issue you will see Code 111 System Pass. There will be a short pause, then a single flash will be displayed. This is called the separator flash that indicates any Stored Codes will be displayed. If there are no stored codes you will see Code 111 System Pass displayed.
Be aware any codes, including System Pass, will be flashed out twice.
Elder User
Joined: Sep 2018
Posts: 735
Likes: 8
From: NC
If your computer is bad it may not store codes at all. When mine went I had no Check Engine light and I put a code reader on it and it told me that the Keep Alive Memory was bad... My truck ran like crap and smelled rich and was blowing out blackish smoke cuz it was running so rich. One good indicator is to pull your computer, open it up and look for leaking capacitors or corrosion on the board.
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