2013 MaxxForce International engine code: spn 3251 fmi 2

I would get the dpf pin tested and do a snap rest with the dpf off to make ensure the engine isn’t making too much soot. Also are the resets being done in Insite?

 

Thank you for your response.
I had called to Machenic. He said he already checked & engine side is ok. Now he wants to replace differential pressure outlet tube. According to you is he going in right direction?

 

Main issue i am seeing is truck is not doing regen while moving. When i do park regen, then it’s complete regen in 40 minutes.

 

Definitely had issues with those old dpf differential pressure sensors, as long as the tubes aren’t plugged, broken or kinked should be fine.

Sensor should read 0psi with key on engine off.

 

Ok
Thanks a lot for suggestions. I would share here later

 

Maxxforce won’t to a regen while driving got a code spn 3251 fmi 21 replace Aftertreatmen injector could he be the sensor that’s why it’s not doing a regen while driving

 

Maxxforce won’t do a cycle regen replace aftertreatment injector getting a code 3251 fmi 21 could the sensor cause a no regen cycle while driving

 

Assuming it’s a 13L that code is for DPFDP excessively LOW. Could either be a leaking dpf, bad diff pressure sensor or damaged or kink pressure tube.