Computer Error Codes
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Mountain Pass
Joined: Jul 2004
Posts: 229
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From: San Diego, CA
Computer Error Codes
On my 99 F250 7.3, mileage 91,000, my service engine soon light has been
staying on. I borrowed a friends OBD II scanner tool and I got the following
error codes: P1391 and P1393. Does anyone know what I need to do to clear
or fix these? Thank you.
Brian
staying on. I borrowed a friends OBD II scanner tool and I got the following
error codes: P1391 and P1393. Does anyone know what I need to do to clear
or fix these? Thank you.
Brian
Senior User
Joined: Oct 2004
Posts: 376
Likes: 0
From: South Dakota
In the 2000 Ford 7.3 Powertrain/Emission Diagnosis Service Manual, 1391 and 1393 "Both DTC P1391 and 1393 together will set when the monitor indicates that all eight glow plugs are not being powered. An open in all glow plug circuits, the glow pug relay, glow plugs, fusible links or all thre monitoring circuits could be the possible causes"
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