What causes a SPN 7497 code?

SPN 7497 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 7497 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 7497 active.

How do I fix SPN 7497?

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 7497

Cummins fault code 7497

What it means

SCR Inlet Temperature Sensor - Voltage Above Normal or Shorted to High Source. This indicates the ECM is detecting a signal voltage higher than the expected range (typically above 4.8V).