Random egr low flow; then random 123, 301 code today.
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Tuned
Joined: Aug 2011
Posts: 376
Likes: 4
From: San Antonio, TX
Random egr low flow; then random 123, 301 code today.
2016 6.7 350. 144000. Meticulous maint, fluids/ filters on schedule. Run diesel kleen every fill up. No CEL on any of the below. It derates and won’t boost all the way so I know something is wrong and plug in. About 3 weeks ago it derated, no cel. Plugged in on the highway-low egr flow pending. Cleared the pending code and boost came back no problem. Today right after I fueled with truck on high idle the whole time it derated with no cel when I left pump- but could have been there before I fueled. I was in traffic and not boosting so I don’t know. Plugged in on the highway got po123, po301 and the 1693 with those. Couldn’t clear on the highway. 10 minutes later stopped. Ran across scale (never shut truck down, idled for about 5 minutes waiting) the 3 codes cleared. Then the low egr flow came on. Cleared it- it never came back on. suggestions where to start? It might be idling a little rougher than usual sometimes.
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
The egr cooler is almost stopped up and needs to be cleaned is my thinking. This will entail removing the egr cooler and rebuilding it with new internals.
https://www.ebay.com/itm/304079831461
https://www.ebay.com/itm/304079831461
Super Moderator
Joined: Aug 2008
Posts: 37,379
Likes: 1,863
From: Frederick, MD
You running the truck hard? I agree sounds like a clogged cooler is in he works. You can clean it and do it yourself if desired.
Take it to ford and they will throw a new one on it.
Take some PB Blaster to those bolts for a few days before attempting.
Take it to ford and they will throw a new one on it.
Take some PB Blaster to those bolts for a few days before attempting.
Thread Starter
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Tuned
Joined: Aug 2011
Posts: 376
Likes: 4
From: San Antonio, TX
Thanks for the responses. Do y’all think the clogged cooler is causing the turbo low pressure and throttle sensor codes? The truck has been run like a scalded dog for the last 100k miles with meticulous maint; it’s been my hotshot truck. It does high idle ALOT as I have a bunk and crashed in it 2-3 nights a week; I still camp in it on my outings. But I slow idled a lot until I got the high idle which at 120k. Not surprised about the cooler, but the other codes were unexpected. Just put the bed back on and retired it for my personal truck. Only problem ever with this truck has been the def module once. I do all my own work. So I’ll put the cooler and valve on my list.
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