How to Perform a DPF Regen on a CAT Engine Using a Diesel Laptop
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If your CAT engine is showing codes like SPN 3719 FMI 0 or DPF Regen Needed, it may be time for a forced regeneration. Instead of heading to the dealer and wasting hours, you can do this yourself using a diesel laptop.
Here’s how to run a DPF regen on a CAT C7, C9, or C15 engine.
🛠 What You’ll Need:
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Our Diesel Laptop
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RP1210 adapter (like Nexiq USB-Link)
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Truck or equipment parked and engine idling
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Key turned on, engine warm
🔄 Step-by-Step: Run a CAT Regen
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Connect your adapter to the truck or machine’s diagnostic port
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Launch the CAT Software
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Connect to the ECM and verify the connection
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Go to Service > Aftertreatment Regeneration
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Select “Start Regeneration”
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Monitor soot level, exhaust temps, and RPM during the process
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Regen takes 20 to 60 minutes depending on soot level
⚠️ Important:
Make sure these conditions are met:
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Coolant and oil temps are in normal range
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No active “inhibit” codes
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Park brake engaged
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No throttle input
If these conditions aren’t met, it will block the regen from starting.
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