What causes a SPN 826 code?

SPN 826 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 826 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 826 active.

How do I fix SPN 826?

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 826

J1939 SPN 826 — Engine Management parameter

What it means

Engine Exhaust Gas Temperature (EGT). This code indicates the ECM has detected a signal from the exhaust gas temperature sensor that is out of range (High, Low, or Erratic).