What causes a SPN 7280 code?

SPN 7280 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 7280 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 7280 active.

How do I fix SPN 7280?

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 7280

Cummins fault code 7280

What it means

Aftertreatment 1 Diesel Exhaust Fluid Tank Level 2 - Data Erratic, Intermittent, or Incorrect. This is usually triggered when the ECM detects an implausible signal from the DEF level sensor.