What causes a SPN 1995 code?

SPN 1995 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a SPN 1995 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 1995 active.

How do I fix SPN 1995?

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

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J1939 SPN

SPN 1995

DPF Regeneration Incomplete Due to Fuel Injection Fault

What it means

The hydrocarbon doser or downstream injector failed to provide the fuel needed to heat the DPF.

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