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2017 Chevrolet Silverado 2500HD Duramax
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Discussion Starter · #1 ·
Hey guys, I’m relatively new to the forum. I have a 2017 3/4 Silverado with 69k miles.
I’ve had the truck for a month and a half and had a check engine light come twice for P026D now.
I love the truck, but I’ve had to clean the map sensor twice to clear the code. It has not done a force regen, and no other issues.
I’m just curious if you guys are cleaning yours as often as well.

thanks
 

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Hey guys, I’m relatively new to the forum. I have a 2017 3/4 Silverado with 69k miles.
I’ve had the truck for a month and a half and had a check engine light come twice for P026D now.
I love the truck, but I’ve had to clean the map sensor twice to clear the code. It has not done a force regen, and no other issues.
I’m just curious if you guys are cleaning yours as often as well.

thanks
Welcome to DieselPlace

It might be worthwhile to replace that MAP sensor with an OEM part
(y)
 

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Discussion Starter · #3 ·
Thanks OkDually!
I thought the same thing so I did purchase an OEM sensor and installed it on August 12th, and it threw the code again yesterday.
 

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Thanks OkDually!
I thought the same thing so I did purchase an OEM sensor and installed it on August 12th, and it threw the code again yesterday.
Are you using an aftermarket filter or Cold air intake?
 

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Discussion Starter · #5 ·
No. The truck is completely stock. I'm buying fuel consistently from an Exxon station that tractor trailers use, so I know the fuel is getting turned over, and not sitting.
 

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No. The truck is completely stock. I'm buying fuel consistently from an Exxon station that tractor trailers use, so I know the fuel is getting turned over, and not sitting.
I would check the MAF next, then NoX1 and NoX 2 sensors
 

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Discussion Starter · #8 ·
Thanks guys!
The sensor has been loaded with soot both times, so I guess I’ll start with replacing the nox1 sensor.
I’m pulling my camper to Erie this weekend, maybe a hard run up the mountains will help clear the soot.
 

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Discussion Starter · #9 ·
Being new to the diesels I just don’t understand all of the soot buildup. Is this normal? Or could I be looking at a deeper problem.
Again thank you guys for the help
 

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Being new to the diesels I just don’t understand all of the soot buildup. Is this normal? Or could I be looking at a deeper problem.
Again thank you guys for the help
Are you using any fuel additives?
 

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Discussion Starter · #11 ·
Stanadyne
 

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Discussion Starter · #13 ·
Well, I’ll cut that out and see how it goes. Thanks!
 

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P026D: Injection Quantity Too High
 

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Discussion Starter · #15 ·
P026D: Injection Quantity Too High
When I researched the code it pointed me to the MAP sensor. Are you saying it could be a different problem?
 

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When I researched the code it pointed me to the MAP sensor. Are you saying it could be a different problem?
Read post #53 pdf in the the link I posted above
Font Rectangle Parallel Screenshot Number
 

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I was getting it dozens of times per day. Cleaned my MAP sensor twice, even though it wasn't visibly soiled at all. Made no difference. If I put the truck in N at stop lights, it doesn't come on.
 

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Discussion Starter · #19 ·
I was getting it dozens of times per day. Cleaned my MAP sensor twice, even though it wasn't visibly soiled at all. Made no difference. If I put the truck in N at stop lights, it doesn't come on.
What was the ultimate fix?
 

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Put it in neutral when I stop.
 
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