What causes a SPN 3372 code?

SPN 3372 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 3372 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3372 active.

How do I fix SPN 3372?

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 3372

J1939 SPN 3372 — Body/Chassis parameter

What it means

J1939 SPN 3372 refers to a discrepancy or communication failure involving Body/Chassis parameters transmitted over the J1939 data link. This typically signifies the ECM is not receiving expected configuration data from the vehicle body controller.