Got an active aftertreatment fault? Don’t panic.
DPF, DEF, and SCR-related codes can put your truck into derate fast — but the right diesel laptop + software can get you out and back on the road in minutes.
🚨 Common Aftertreatment Fault Codes
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SPN 3251/FMI 0, 7, 18 – DPF filter efficiency or regeneration faults
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SPN 3364/FMI 9, 10 – DEF quality or dosing issues
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SPN 4334/FMI 0 – SCR system failure
These codes can trigger check engine lights, derates, and eventually shutdowns. That’s why resetting them properly is critical.
🔧 How to Reset Aftertreatment Faults
Here’s how our DieselScanners setup helps:
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Plug in the included Nexiq USB Link 3 to your 9-pin port
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Launch software (JPRO, Diesel Tech, or Universal Diag) on your rugged laptop
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Read active fault codes
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Perform a forced regen, NOx sensor reset, or DEF quality reset depending on the issue
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Clear codes after reset or repair
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Verify live data (DPF pressure, DEF dosing rate, NOx values, etc.)
✅ What You Need
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DieselScanner Pro Kit (Includes rugged laptop + software preloaded)
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Nexiq USB Link 3
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Internet (for remote support if needed)
📦 Our Kits Work With:
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Cummins
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Detroit Diesel
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International/MaxxForce
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Paccar
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Volvo/Mack
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Freightliner and more
💬 Real-World Example
“I had a customer stuck in derate with a Cummins ISX throwing DEF dosing codes. Used the DieselScanners kit to reset the system and force a regen — back on the road in 30 minutes.”
— Fleet Owner, TX
🛠 Bonus: Live Support Included
Every DieselScanners purchase includes free remote tech help via chat and text. We walk you through fault clearing and regens live.
👇 Want to Reset Faults Fast?
Explore our ready-to-ship diesel diagnostic kits
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