Electrical Chaos
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Trailering
Joined: Oct 2013
Posts: 21
Likes: 0
Electrical Chaos
2017 Ford F350, Dually, 6.7 330,xxx miles. 3d engine, 130,xxx miles. Deleted.
IF Codes deleted truck runs and operates normally. Suddenly, I simultaneously lose audio on the entertainment system, 911 warning, a wrench icon, and a fuel hiccup that creates a minor stall and then more stalls if the throttle is at a certain power level. Codes include: P01C5, B1A01, P1853:00, P1841:00, P1853 - Transfer Case Contact Plate 'B' Short Circuit To Ground, P1841 - Transfer Case Shift Motor Short Circuit To Ground, P01C5:00, P0685:00, P01C5 - Fuel Pressure Sensor A Circuit Low, P0685 - ECM/PCM Power Relay Control Circuit / Open, - I think that is most of them.
I suspect that all of these codes point to a single problem, e.g. a defective PCM or similar. But ????
Any suggestions?
IF Codes deleted truck runs and operates normally. Suddenly, I simultaneously lose audio on the entertainment system, 911 warning, a wrench icon, and a fuel hiccup that creates a minor stall and then more stalls if the throttle is at a certain power level. Codes include: P01C5, B1A01, P1853:00, P1841:00, P1853 - Transfer Case Contact Plate 'B' Short Circuit To Ground, P1841 - Transfer Case Shift Motor Short Circuit To Ground, P01C5:00, P0685:00, P01C5 - Fuel Pressure Sensor A Circuit Low, P0685 - ECM/PCM Power Relay Control Circuit / Open, - I think that is most of them.
I suspect that all of these codes point to a single problem, e.g. a defective PCM or similar. But ????
Any suggestions?
Fleet Mechanic
Joined: Aug 2006
Posts: 1,762
Likes: 401
From: Logan, Utah
There is a large plug with may wires, below your master cylinder. At night get a flashlight and look down on top of your fender liner. See if it came undone. My '19 did recently. My son found it by accident.
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Trailering
Joined: Oct 2013
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I found a couple of connectors - they were grimy. I'll get some dielectric grease and treat the connectors to keep them safe. However, I doubt that this is the problem. I suspect the PCM and/or PCM....
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Trailering
Joined: Oct 2013
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My experience with Ford 6.7s has not been pleasant. It has been expensive. 330,000 miles, 3 dead engines.
Fleet Mechanic
Joined: Dec 2021
Posts: 1,735
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As for your problem, how long have you had it deleted and the delete program operable? Id suspect if the delete was recent something in the delete software rewrite is causing it.
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Fleet Mechanic
Joined: Jul 2008
Posts: 1,937
Likes: 1,221
From: Southern Crescent
Sounds like the system is load shedding, since you are loosing the audio system ( and probably some other options as well)
With all that weirdness going on the first thing I would suspect is low battery voltage. That can drive these trucks nuts. How old are your batteries and are they being properly charged by the alternator?
With all that weirdness going on the first thing I would suspect is low battery voltage. That can drive these trucks nuts. How old are your batteries and are they being properly charged by the alternator?
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