What causes a SPN 82 code?

SPN 82 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 82 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 82 active.

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 82

J1939 SPN 82 — Engine parameter

What it means

Engine Air Start Pressure - Data valid but above/below normal operating range. This code monitors the air pressure used by the pneumatic starting system.