Cummins 3245 Aftertreatment Diesel Particulate Filter System - Mechanical System Not Responding or Out of Adjustment
What this code means
Cummins fault code 3245 (SPN 3936 / FMI 7) refers to: Aftertreatment Diesel Particulate Filter System - Mechanical System Not Responding or Out of Adjustment. It is logged by the engine control module (ECM) on Cummins-powered vehicles and read over the J1939 diagnostic network.
Emissions system
This is an emissions after-treatment related fault on the DPF system. On Cummins-powered vehicles it is commonly seen when that after-treatment system is faulty, restricted, or has been modified.
Tune it yourself
Add Cummins diesel tuning to your workshop: DPF, EGR and SCR delete and derate calibrations. We supply the tools and the file, and you keep the profit.
Start tuning
Or send us your ECM
Prefer we handle it? Ship us your Cummins ECM and we'll build and flash the delete or derate calibration for you.
Send your ECMTuning & delete insight Dealer
Which after-treatment system this code belongs to, and how it behaves in a delete/off calibration, is reserved for active AltTune dealers.
Dealer sign in
Sign in with your files.alttune.com account to unlock the tuning & delete insight.
Become an AltTune dealer
Join the dealer network to unlock the tuning & delete guidance on every code. We respond within 24 hours.
Frequently asked questions
Cummins fault code 3245 (SPN 3936 / FMI 7) indicates aftertreatment diesel particulate filter system - mechanical system not responding or out of adjustment.
Cummins 3245 is generally treated as a moderate-severity fault. Have the engine and its wiring inspected, and confirm the reading with a J1939 diagnostic scan before clearing the code.
Yes. Cummins 3245 is associated with the DPF after-treatment system on Cummins engines.
