What causes a SPN 5593 code?

SPN 5593 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 5593 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 5593 active.

How do I fix SPN 5593?

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 5593

Cummins fault code 5593

What it means

Aftertreatment Gas Pressure - Data Erratic, Intermittent, or Incorrect. This indicates an electrical fault (usually a short to ground) in the circuit for the pressure sensor located before the SCR or DPF.