Ford Excursion :: Code P0683 - Glow Plug Control Module To PCM Comm Circuit
Jan 25, 2013
I have a 2002 7.3L and keep throwing a P0683 code (Glow Plug control module to PCm comm circuit). I have looked though all the Forum posts I could and it looks like the GPR, or the GPCM, or harness are at fault. I know my truck has the GPCM ... does it also have a GPR? I am not getting ANY individual GP failure codes, but the damn thing is having a hell of a time starting in the cold.
1) How do I determine if the GPCM is bad?
2) If I have a bad ground?
3) Bad connector to GPCM connection?
4) If something is wrong with the wiring harness itself
Last night I unplugged the harness from the GPCM, cleaned the connectors, added di-electric grease to improve the connections .. made no difference.
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06 6.0 F250 throwing code P0677 #7 glow plug circuit module. I don't think one bad plug would cause a no start, however coupled with too much oil possibly? Swapped my oil about 500 miles ago, I put in 20qts accidentally, drained off about 3-4 qts eyeballed, truck fired up and ran fine no smoke nothing. Yesterday morning I was leaving work and moved my truck from parking space to behind the bay at my fire station, I turned the engine off.
Loaded up my gear and turned the engine to the aux position and someone was talking to me so inlet it sit for a while in the auxiliary position. Went to crank no start, turned the key off then back on and it fired. Fast forward after 7 different starts throughout the day, I'm at dinner with my son we go to leave engine will not start at all, rolls and rolls and rolls nothing. Towed her home and scratching my head. Over filled oil with a bad plug cause no start??
Egr delete, new oil cooler, cat and muffler delete, upgraded Y turbo pipe. Also have an SCII throwing codes p0677 and p0401 egr code....
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How to fix SES P0670?? I understand there's a whole procedure on checking fault.
P0670:GPCM Glow plug control module control line failure. Open/grounded circuit, open/shorted GPCM, failed PCM
But how did you resolve problem? replaced GPCM, found open circuit, short --if so where?-- or replaced with updated harness.
(4C3Z-12B568-AA connector upgrade kit as in picture)???
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I have have been getting a p0671 fault code every time I start my truck now that its cold. If I clear it and its warm it doesn't retrigger at least until it sits overnight again. Is this likely to be that the Glow Plug needs replacing on the #1 cylinder? Autolite Glow Plug is only $20 or so. Mechanic is recommending changing the bank and the harness but I'd rather just do the one GP myself if possible. I see on here that the valve cover has to come off. Which side is #1 on and do I need any gaskets etc? How big a job is it to remove the valve cover? I'd go and look myself but its cold out ...
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OK, what does a glow plug control module do? The short bus I got has one on it. It looks like it fits right into the circuit without much, if any, modification. I got one with my short bus and am curious if it would be something worth adding to my pickup. So...what does it do and could I/should I install it?
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So; I bought my 07 f350 6.0 the other day. I have a light on that sends a code for glow plug control module, but the truck starts fine, the same in cold temperatures as warm, so far nothing below 32 degrees though. I dont have the code # at the moment, but will update when i get the scanner back. Why this module is throwing a red flag?
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2001 Excursion Service Engine soon light came on, took it to Auto Zone, said #1 cylinder glow plug. I have a Superchips tuner, can I diagnose it with it? Which is the #1 cylinder?
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Just got back from the beach yesterday. On the way back I noticed the check engine light on and read the codes. It listed 4 codes, P0671,P0672, P0677 and P0678. From what I can find, Cylinder 1, 2, 7 and 8 have the glow plug circuit open. Truck ran fine and didn't miss a beat. Ambient temp was around 80 when we started up the truck so I guess diesel plugs are not to crucial for that temp. I did notice when driving back the Vbatt would jump from 12.2v at1854 RPM (34 MPH) and 13.8v at 1652 (57 MPH).
Would bad batteries or low batteries cause this type of problem? This may be wishful thinking on my part. I have tested the batts with a DMM and they are at 12.3v. I took them out and charged them but they always go down to 12.3v. FMP is 47.5v to 48.5v. It seems suspect that all four glow plugs would be bad so I assume it could be the harness. What are some ways I can test to verify where the problems come from.First thing I would do is get two new batteries as these are still under warranty.
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So i just finished putting in new high pressure oil rail cup seals in and a new #2 injector. Truck was running great for about 5 miles and then just shut off. When I had it towed home I plugged in the super chips tuner "no tunes installed" and I have a p0460, p0463, p2290, p2291. I also have a #7 glow plug circuit failure Ive been a little neglectful in getting done.
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I randomly started throwing a couple codes that have been causing my "check engine" light to come on ... came on on my way into work this morning) . I know that the P0683 code is the Glow Plug Ctrl Module to PCM Comm Circuit (from my code reader), but I am not sure what to do next ... I have the dealer service DVD from 2002 that I will look at this weekend....
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Truck has been running very well while in the warmer North Carolina climate pulling trailers with no limp mode or wrench light. However, when daughter started the truck this morning, SGII showed one DTC and when she pulled it up it was P0675. OK, glow plug num 5 maybe or the module. No issues starting or rough cold idle. I told her to clear the code and we'll see if comes back.
She did ask if it is something she should have it repaired before the trip back to Vermont. So I thought I'd ping the group here since reading posts, they seem to be fairly easy to replace (and assuming it isn't a chafed wire) and I could probably save her some $. Just want to make sure there isn't any chance of real engine damage.
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Just happened to check codes today for fun and found something interesting. I've known about 2 or 3 glow plug codes since last winter but I looked today and I have a code for every single circuit. Thought that was kind of odd.... I already have 8 brand new plugs and both harnesses from Autonation sitting in the back seat, was just waiting till the fall to change them out. At 176k on the originals I decided to change them all. But now I'm thinking the GPCM may be faulty as well.
P0671 Cylinder 1 Glow Plug Circuit
P0672 Cylinder 2 Glow Plug Circuit
P0673 Cylinder 3 Glow Plug Circuit
P0674 Cylinder 4 Glow Plug Circuit
P0675 Cylinder 5 Glow Plug Circuit
P0676 Cylinder 6 Glow Plug Circuit
P0677 Cylinder 7 Glow Plug Circuit
P0678 Cylinder 8 Glow Plug Circuit
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Pulled p0678, glow plug 8. I've changed out the glow plug on cylinder 1 a few years ago.
Cylinder 8, being on the driver side rear, is it difficult to change out? Should I just pay Ford or another shop to fix this?
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CEL came on in my 2013 6.7L with 74K miles a couple days ago. Pulled the code today and it was a P263C - Glow Plug Driver Performance code. Any remedy for this.
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#2 contribution/glow plug/injector code ????? Harness looks good. What's the malfunction?? Runs rough. Never seen those 3 codes together.
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My cruise control is out. I have checked the clock spring wiring and it is OK. Going to replace the brake switch today. Looked for the CC module but cannot locate. Where it is on the diesel X.
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I was told that their is an AC control module in the dash. As I have a 2000 that we are still getting parts, where in the dash this control module is?
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I have a 2005 Eddie Bauer 4X4 with the 6.0 and Automatic Temperature Control. I need a new blower motor control module, and have been confused by what I have been able to find online. What is the full Motorcraft part number, or other information so I can get one.
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Discovering where my cruise control module is located on my 05 Excursion. . . I've looked at all of the pictures showing that it should be right in front of the a/c unit, underneath the vacuum pump, but on both my 04 and my 05 Excursions, there is nothing to be found on that location. Where the bugger can be located.
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I bought a 2002 Excursion 2wd V10 at an auction with 105,000 miles. I've been working through the little problems and I'm down to one last small item.
The cruise control will not work. I found a thread to diagnose the problem. My diagnosis is:
After doing the self test I received: 3 flashes - deactivator switch is open or circuit defective.
What does this represent and what shall I do to correct it?
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After about 6 months I finally got the alternator replaced in the Tribute. I totally forgot about the CEL that was on for EGR Circuit. I've found a couple of pages ( OBD-II Trouble Code: P0403 Exhaust Gas Recirculation Circuit Malfunction ) that explain how to diagnose the issue but I was wondering if any other route for something that may be more common than another thing.
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