Intermittent CEL, 2018 Duramax

392 Views | 1 Replies | Last: 4 mo ago by harge57
dahouse
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AG
I have a CEL light that throws the P026D Manufacturer Control code. It will come on for a few days then go away for awhile.

I had my DEF sensor/pump assembly replaced a couple months ago, but that was throwing a different code and my DEF level quit working, so that's not it.

I'm thinking MAP sensor, maybe. I put one of those MAP sensor relocator things on the truck because of the know issues with the sensor getting clogged up.

Anyone dealt with this?
Cody
Fightin Texas Aggie c/o 04
harge57
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AG
Man ain't the EPA great.
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