Detroit DD Platform DPF Ash, Regen, and DOC Path — DD13 / DD15 / DD16
On Detroit DD engines, prove regen success and service DP tubes before performing ash cleaning or DPF replacement.
Fault Overview
YMM-specific path for DPF ash differentiation, regen performance, DOC condition, and related restriction issues on Detroit DD13/DD15/DD16 platforms. Detroit publishes detailed regen and aftertreatment service procedures. Follow the latest information for the specific MCM software and engine serial number.
Engine & Platform Coverage
Symptoms
- •Detroit DPF ash
- •DD15 differential pressure
- •DD13 regen abort
- •Detroit DOC face
- •DD soot load
- •GHG17 DPF cleaning
Possible Causes
- 1.Ash accumulation
- 2.Incomplete regens
- 3.DP sensor or tube issues
- 4.DOC restriction
- 5.High engine-out soot
- 6.Oil consumption
- 7.Temperature sensor faults during regen
Wiring & Circuit Notes
Inspect Detroit-specific sensor connectors and DP tube routing. Check for carbon packing and heat damage.
DVOM Specs & Sensor Tests
DP and load data via DiagnosticLink. Temperature map during regen. Abort reasons. Post-regen DP. OEM ash service guidance.
Diagnostic Flow — FSM Sequence
AI Diesel Tech enforces this evidence-gate sequence. Each gate must pass before advancing.
7 steps locked behind Technician Mode- 1Step 1 — Record Soot/Ash Data and DP via DiagnosticLink: Record soot/ash data and DP via DiagnosticLink. Follow the latest information for the specific MCM software and engine serial number.
- 2Step 2 — Perform Complete Forced Regen and Confirm Targets: Perform complete forced regen and confirm temperature targets are met.
- 3Step 3 — Re-Measure DP and Service Tubes if Needed: Re-measure DP and service tubes if needed. Detroit-specific DP sensor tube routing should be inspected for carbon packing and heat damage.
- 4Step 4 — Decode Abort Reasons and Correct Them: Decode abort reasons and correct them before attempting another regen.
- 5Step 5 — Evaluate DOC Face if Light-Off Is Impaired: Evaluate DOC face if light-off is impaired.
- 6Step 6 — Perform Ash Cleaning or DPF Replacement per Detroit Criteria: Perform ash cleaning or DPF replacement per Detroit criteria only after confirming ash is the restriction.
- 7Step 7 — Address Combustion or Oil Sources of Rapid Loading: Address combustion or oil sources of rapid loading to prevent repeat service.
- 8Step 8 — Validate With Successful Regen and Normal DP: Validate with successful regen and normal DP before releasing the vehicle.
Unlock the full evidence-gated diagnostic sequence, DVOM test steps, and repair procedures in Technician Mode.
Full Diagnostic Access
Verification steps, preventative measures, severity guidance, and legacy comparison are available in Technician Mode.
Typical Repair Costs
Tube service $80–200; abort repair variable; DOC service $300–2,500; ash cleaning or DPF replacement $400–3,000+; root-cause correction variable.
Start Diagnosing This Fault Now
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Related Systems
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Common Symptoms
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Summary
Use the AI Diesel Tech diagnostic engine to run this code through a structured, evidence-gated sequence and get a confirmed root cause before any parts are replaced.