What causes a SPN 3198 code?

SPN 3198 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 3198 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3198 active.

How do I fix SPN 3198?

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 3198

J1939 SPN 3198 — Body/Chassis parameter

What it means

This code indicates an invalid or missing data signal related to Body/Chassis parameters being broadcast over the J1939 data link. It usually implies the engine controller is expecting data from the body controller that is not within the correct range or is not being received.