Thread: DoD Question

My MPG has gone from 22-24 to 19-21, and I can't remember the last time I saw a little puff of smoke from the rear. I think my DoD has turned itself off. Is this possible, and will it harm the engine?

I know it will, if it's a misfire on one of the DoD cylinders. However, I'm not getting any.

I deactivated DOD on my 2012 suburban and gas mileage did not change.

I deleted it because of the issues it creates.

I don’t think it can turn itself off without a MIL.

I bought a Range device to deactivate.


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I think a check engine light will turn off dod/afm. I can't remember what people typically unplug to get the dod/afm to turn off. When I bought my GXP, I would see poof's of smoke in my rear view mirror from time to time. I turned off the dod/afm and it stopped. at like 120,000 miles I got low oil pressure, ended up being the pickup tube o ring in the oil pan. I also have a lifter fail which necessitated a new cam and lifter set. that happened like 30,000 miles after dod/afm was turned off.

my gas mileage pretty much never changed the whole time.

Originally Posted by Hurricane87

My MPG has gone from 22-24 to 19-21, and I can't remember the last time I saw a little puff of smoke from the rear. I think my DoD has turned itself off. Is this possible, and will it harm the engine?

That smoke will eventually carbon up the rings and score the cylinders causing low compression. I would either by a Range device or a tuner to delete it. My oil consumption went down to zero after I bought and installed a Diablo tuner. You can use the stock 87 octane tune to save money on gas and just delete the DOD. I would do it before the engine is damaged.