What causes a SPN 3730 code?

SPN 3730 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 3730 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3730 active.

How do I fix SPN 3730?

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 3730

J1939 SPN 3730 — Body/Chassis parameter

What it means

J1939 Network Error: Invalid or Missing Body/Chassis Parameter Data. This code indicates that a controller on the J1939 data link is receiving information from the Body/Chassis module that is out of range, incomplete, or incorrectly configured.