What causes a SPN 6972 code?

SPN 6972 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 6972 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 6972 active.

How do I fix SPN 6972?

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 6972

Cummins fault code 6972

What it means

Ambient Air Temperature - Data Erratic, Intermittent or Incorrect. This code indicates the ECM is receiving an implausible signal from the sensor located in the air intake or front bumper area.