Fault code 3375 on my Cummins isx15

after-treatment diesel particulate filter - that's all I have.

 

3375 is dpf regenerations occurring to frequently. Not related to engine oil pressure as that would be a separate issue.

 

Clean injector 7, replace it is the real thing to do. Probably full of carbon not letting regen to happen properly. Search YouTube for rawze videos, he has lots of excellent information for keeping these engines healthy. He works on a cm871, but the same theory applies to later cm2250, cm2350, and x15 engines. It is called egr tuneup I think. Series of 6. Must watch.

 

After researching your fault code with all my diag and dealer software, 3375 has to do with your after-treatment system, more specifically your DPF. Common causes for this code are: 1) DPF differential pressure sensor failure 2) Fuel rail pressure relief valve failure 3) Loose injector high-pressure connector 4) After-treatment DPF failure 5) ECM calibration.

I hope this helps.

 

Welp there goes about $10,000 down the drain with Labor cost...

 

Depending on the labor rate of the shop, you arent too far off. If I had the year if the engine in question, I could give an exact amount of labor hours according to my software that uses the dealer "book" times.