Service emission?

[JStrong]

Im getting a service emission system msg, 174mi till 65 max speed.
I looked into and needed to clean the mass air flow sensor. Which was dirty and will be cleaning in routine maintenance going forward.
It cleared the msg after a while the next day.
Within a week it's back again, also it putting a check engine light on.
Had anyone else experience this?

 

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[R467X]

What year? 3.0? 6.6?

If it's a 24+ L5P you have two MAP sensors attached to the y bridge. They should be replaced, not cleaned.

Second - do you monitor regens? Your first step should be to initiate a regen and go for a 30 mile round trip on the highway. Most likely your truck has been unable to regen and your diesel exhaust filter is at 100% +, unable to clean itself.

Could be other issues too but I would 100% start at initiating a regen and going for a 30 mile round trip before anything else