What causes a SPN 3772 code?

SPN 3772 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 3772 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3772 active.

How do I fix SPN 3772?

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 3772

J1939 SPN 3772 — Body/Chassis parameter

What it means

SPN 3772 indicates an invalid or missing Body/Chassis parameter configuration. This occurs when the Engine Control Module (ECM) or Central Gateway receives data from the body controller that does not match expected values or is missing entirely from the CAN stream.