Delta P replacement

[Rawze]

(03-07-2017 )recap483 Wrote:  I have a 2010 cm871, that will skip under acceleration until the check enging light comes on. Then the problem will go away. The freightliner trouble code indicated delta p sensor, so I replaced it. My question is do I have to program ecm to new sensor? I still have same problem after replacement. Thanks

Nope. Not for the Delta-P sensor. The only thing you need software for replacing on a 871 engine is the ...

* ECM itself - Obviously, if it goes bad, the new one will need to be programmed.

* The the turbocharger - You need the software to re-calibrate it any time it is apart or of it gets replaced.

* If you have a really really old Doser injector. - If you have an original factory Doser injector from back before 2011, and you replace it with a new one, then the software in the ECM needs an update. This is because the newer style doser injector has lower resistance in the coil and will produce random faults for it being shorted out.

* If you get the DOC and/or DPF cleaned or replaced, you need to do a "Maintenence Reset" using the software, otherwise the ecm might think you tampered with it.

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Have you done a thorough EGR tune-up including replacing all the sensors mentioned? -- If not then start there.