Diesel Preheat in Progress - Bad glow plug cylinder 3

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SOP

Member
Dec 11, 2017
45
10
8
Truck Year
2014
Hey Guys - looking for some help here. I've been searching around online and can't find a good video of someone replaced a glow plug(s) on an ecodiesel. My truck is flashing 'Diesel Preheat in Progress'. It does it until the truck warms up, and then if I turn it off/back on it sometimes will go away. Truck is showing these two codes: P06BB and P0673. I'm assuming my issue is a bad glow plug cylinder 3 and wondering if someone can point be in the right direction so I know which plug it is under the hood as well as some tips removing it. Last thing I want to end up with is breaking it off. Thanks!
 

SOP

Member
Dec 11, 2017
45
10
8
Truck Year
2014
Update to my first post. I’ll have the new plug tomorrow and will be installing sometime over the weekend. For others looking for information regarding the cylinder order, it is 123 passenger side, 456 driver side starting from the grille to firewall. I’m considering doing a how to step by step video to help others looking to tackle this in the future. If someone has a link to an existing video, let me know and I’ll reference on this thread.
 
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John

Well-Known Member
Nov 13, 2015
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Update to my first post. I’ll have the new plug tomorrow and will be installing sometime over the weekend. For others looking for information regarding the cylinder order, it is 123 passenger side, 456 driver side starting from the grille to firewall. I’m considering doing a how to step by step video to help others looking to tackle this in the future. If someone has a link to an existing video, let me know and I’ll reference on this thread.
Spray the crap out of it with PB Blaster or Kroil for a couple days before removing. Work it out slowly by slightly loosening and tightening.

The big problem is the design of the threads in the block that allow debris to collect above the glow plug.

Others have experienced the same code and it turned out to be a bad glow plug controller and not the plug itself.

Good luck. I'm looking forward to the video.

Here's a photo showing the design.
 

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TC Diesel

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Jul 14, 2016
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Blaine
www.tcdiesel.com
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Glow plugs as John mentioned PIR, be careful ,The 3.0 Glow plugs are small and fragile, Brake one off and you will be using profanity. if it does not come out cold, start the engine and work it when running. it may take 10 minutes working it but it will come, don't get frustrated just work it, be patience.
 

BoostN

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I just deleted a earlier post. I refuse to let members put down others when asking a question. We're here to learn, the whole point of a forum right?

Thanks to @John @TC Diesel continuing on helping our members in this thread, that's why this forum is here. Not to say "hey, you have no idea what you're doing, now go spend 2K at the dealer!"
 

1shadowsabre

Active Member
Oct 18, 2015
361
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43
Washington State
Truck Year
2015
Spray the crap out of it with PB Blaster or Kroil for a couple days before removing. Work it out slowly by slightly loosening and tightening.

The big problem is the design of the threads in the block that allow debris to collect above the glow plug.

Others have experienced the same code and it turned out to be a bad glow plug controller and not the plug itself.

Good luck. I'm looking forward to the video.

Here's a photo showing the design.
Wow, that is a great picture! literally worth 10,000 words. It is pretty easy to see why it is so hard to get out with those threads buried like that.
Where did you come by that photo?
 

John

Well-Known Member
Nov 13, 2015
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Wow, that is a great picture! literally worth 10,000 words. It is pretty easy to see why it is so hard to get out with those threads buried like that.
Where did you come by that photo?
I had seen it on another site and saved it on my computer.
 
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1shadowsabre

Active Member
Oct 18, 2015
361
104
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Washington State
Truck Year
2015
So here is a question for you folks who live in colder climates.
How long does it take for your truck to start after you turn the key on.
I live in western WA., pretty mild climate so my truck starts in a few seconds. No block heater needed
 

TC Diesel

Well-Known Member
Jul 14, 2016
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Blaine
www.tcdiesel.com
Truck Year
2015
You should only need the Block Heater in -0F, The wait to start is conditional and varies according to Ambient and last operation coolant temp.
 

SOP

Member
Dec 11, 2017
45
10
8
Truck Year
2014
Replaced the glow plug yesterday and it went smoothly. I drove the truck about a half hour each way to/from the dealer to get the part so the engine was hot when I removed it. Here’s a quick step by step of what I did:

- Disconnect MAF senor, remove air box & air intake tube up to the 90 degree boot to the turbo
-removed the EGR Diffuser Tube to get a little more room to work (not really necessary but I would recommend)
-pull up on the small ‘t’ shaped plastic handle of the electrical connection to the glow plug. Might have to wiggle/twist as you pull but it should pop right off.
-spray some PB blaster, use a 6pt 1/4” drive socket and small 1/4” ratchet with a short extension (so you don’t use too much torque). Mine broke loose easily but started to get harder to turn after a couple if turns out. I just kept spraying PB and would go in and out a lil further each time. Probably took 20 mins of screwing in and out / waiting each time I sprayed PB for it to soak in.

New one went in just fine. Problem fixed!
 

John

Well-Known Member
Nov 13, 2015
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Thanks for the report. Glad it went well. How many miles on that engine?
 

Scottd

Member
Apr 23, 2017
78
23
8
Truck Year
2015
Did you get to do the video??


Sent from my iPhone using Tapatalk
 

SOP

Member
Dec 11, 2017
45
10
8
Truck Year
2014
Did you get to do the video??


Sent from my iPhone using Tapatalk

Sorry, I wish I would have done one but I was crunched for time to get it done before our 3 month old woke up from a nap. I did take a few pictures though. The zoomed out picture with the yellow arrow is pointing down to the passenger side glow plugs, which are almost near the top of the engine. The picture with the blue line just shows where the EGR Diffuser tube goes, yellow circle is drawn around cylinder 2 glow plug, and the green arrow is pointing at where the cylinder 3 plug was. Then there's a closer look at the electrical connection on the glow plug. Hope these help.
 

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Scottd

Member
Apr 23, 2017
78
23
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Truck Year
2015
Sorry, I wish I would have done one but I was crunched for time to get it done before our 3 month old woke up from a nap. I did take a few pictures though. The zoomed out picture with the yellow arrow is pointing down to the passenger side glow plugs, which are almost near the top of the engine. The picture with the blue line just shows where the EGR Diffuser tube goes, yellow circle is drawn around cylinder 2 glow plug, and the green arrow is pointing at where the cylinder 3 plug was. Then there's a closer look at the electrical connection on the glow plug. Hope these help.
Excellent job there. My grandfather and father always taught me....what one man can do another can do. You proved that with this job, that would have scared so many other away.

If you don’t mind me asking what did the new glo plug cost you from the dealer?


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SOP

Member
Dec 11, 2017
45
10
8
Truck Year
2014
Excellent job there. My grandfather and father always taught me....what one man can do another can do. You proved that with this job, that would have scared so many other away.

If you don’t mind me asking what did the new glo plug cost you from the dealer?


Sent from my iPhone using Tapatalk
$66 after tax. I called around to see who had them in stock. One dealer was charging $74 plus tax. Not a big deal, but if you were buying more than one it would add up. They're also sold online for cheaper than I paid, but I wanted to pick it up and do it same day.
 
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Scottd

Member
Apr 23, 2017
78
23
8
Truck Year
2015
$66 after tax. I called around to see who had them in stock. One dealer was charging $74 plus tax. Not a big deal, but if you were buying more than one it would add up. They're also sold online for cheaper than I paid, but I wanted to pick it up and do it same day.
Not bad at all for a consumable part. Thanks again!!


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