What causes a SPN 6769 code?

SPN 6769 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 6769 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 6769 active.

How do I fix SPN 6769?

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 6769

Cummins fault code 6769

What it means

Aftertreatment 1 Intake NOx Sensor Heater - Out of Calibration. This indicates the ECM detected that the intake NOx sensor heater is not reaching its operating temperature or is consuming incorrect amperage.