What causes a SPN 7707 code?

SPN 7707 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 7707 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 7707 active.

How do I fix SPN 7707?

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.

OBDIY

J1939 SPN

SPN 7707

Cummins fault code 7707

What it means

Engine Exhaust Gas Temperature 1 (Inlet) - Data Erratic, Intermittent or Incorrect. This specifically indicates the Aftertreatment Diesel Particulate Filter (DPF) Inlet Temperature Sensor signal is out of range.