What causes a SPN 2297 code?

SPN 2297 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 2297 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2297 active.

How do I fix SPN 2297?

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 2297

J1939 SPN 2297 — Aftertreatment/Emissions parameter

What it means

SCR Outlet NOx Sensor Heater Control circuit voltage out of range. The ECM detects an electrical failure in the heater circuit of the rear NOx sensor.