What causes a SPN 5 code?

SPN 5 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 5 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 5 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

Log in Sign up

J1939 SPN

SPN 5

J1939 SPN 5 — Engine parameter

What it means

Brake Event Air Pressure signal is out of range, either too high or too low, or the circuit is open.

Sign in to view symptoms, probable causes, diagnostic steps, severity, and related codes

Log in Sign up free