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DEF system service required

Jdillard74

Jdillard74

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Hey guys,

so, I got the dreaded message along with the check engine light. Code read def injector was bad. I replaced the injector cleared the codes and it ran fine for roughly 200 miles. Message popped up that I’m limited to 5mph in 110 miles with 50% def in the tank. After a few miles it went away. Today, I get in my truck and that popped up again. Is there a way to clear that after replacing the def injector? Thanks!!
 
Jdillard74 said:
Hey guys,

so, I got the dreaded message along with the check engine light. Code read def injector was bad. I replaced the injector cleared the codes and it ran fine for roughly 200 miles. Message popped up that I’m limited to 5mph in 110 miles with 50% def in the tank. After a few miles it went away. Today, I get in my truck and that popped up again. Is there a way to clear that after replacing the def injector? Thanks!!
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Oh, its a 2017 Ram 2500 6.7
 
Did you replace the fluid at the time of the injector replacement?
 
Jdillard74 said:
No sir I didn’t
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I would start there, bad fluid causes all kinds of issues.

Then use a scan tool to clear the code, but if the code was cleared and came back after 200 miles id lean towards the DEF causing the issue.
 
Found this the otherday while going down the rabbit hole. You could try this bypass mod...your truck wont go into Limp mode but everything def related would work until you can properly fix it.

 
I cleared the codes when the injector was replaced. The problem now is the screen will pop up saying limited mph then go away.
 
What code(s) were you seeing before you cleared them? It sounds to me like you have something upstream operating intermittently.

As @AH64ID suggested, you may want to drop the tank, remove all the old fluid, flush with fresh DEF or distilled water (not tap water) and then reinstall.

Was the new injector an OEM or one purchased aftermarket?
 
Brutal_HO said:
TLDR; it's 10 minutes of constant repetitive gum flapping, followed by 15 minutes showing 2 wires being hack spliced together, while subjecting the viewer to listen to the dumbest most annoying background music ever played on youtube.
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I’m glad they used the term “Hack” in the title of the video.

That is indeed a hack job.
 
mbarber84 said:
What code(s) were you seeing before you cleared them? It sounds to me like you have something upstream operating intermittently.

As @AH64ID suggested, you may want to drop the tank, remove all the old fluid, flush with fresh DEF or distilled water (not tap water) and then reinstall.

Was the new injector an OEM or one purchased aftermarket?
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The injector was an OEM. The only code I had was from the bad injector.
 
mbarber84 said:
So at this point you’re getting an intermittent message on the dash that’s attempting to put you in the 5mph derate? But no other codes are showing either pending or active?
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Correct. No other codes have popped up and that 5mph message goes away.
 
Jdillard74 said:
Correct. No other codes have popped up and that 5mph message goes away.
Click to expand...

Drain the tank, clean it with distilled water, and add new fresh DEF.

That should have been done with the injector replacement, or even before the injector replacement.
 
AH64ID said:
Drain the tank, clean it with distilled water, and add new fresh DEF.

That should have been done with the injector replacement, or even before the injector replacement.
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I will try that. Thanks!
 
I have read step 1 is clean the tank, refill with FRESH DEF. step 2 clean crystallization off the injector. Then go from there. Seems to have had decent results in the past.
 
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