What causes a SPN 3455 code?

SPN 3455 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 3455 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3455 active.

How do I fix SPN 3455?

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 3455

J1939 SPN 3455 — Body/Chassis parameter

What it means

Proprietary Body/Chassis Parameter – This code indicates that the Vehicle Control Unit (VCU) or Chassis Gateway is not receiving expected data or is receiving invalid data from a body-mounted auxiliary device via the J1939 network.