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Re: 09 int bus, ebp code 3346
Posted to HD/Fleet Forum on 5/13/2019

Roger, a hip shot here. Physically Make sure the EGR valve is opening and closing. Also inspect the ITV. The AMT test results have to be compared to graphs in the diag manual. Or the graphs might be in the Aftertreatment Manual. Wouldn't hurt to clean out the ... Login to read more.