What causes a SPN 7000 code?

SPN 7000 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 7000 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 7000 active.

How do I fix SPN 7000?

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 7000

Cummins fault code 7000

What it means

Aftertreatment 1 Outlet NOx Sensor - Abnormal Update Rate. This code indicates the Engine Control Module (ECM) has lost communication or is receiving erratic data from the outlet (tailpipe) NOx sensor over the J1939 Data Link.