What causes a SPN 7315 code?

SPN 7315 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 7315 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 7315 active.

How do I fix SPN 7315?

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 7315

Cummins fault code 7315

What it means

Aftertreatment 1 Intake NOx Sensor - Abnormal Update Rate. This indicates the ECM has lost communication or is receiving erratic data from the NOx sensor located at the inlet of the SCR catalyst.