What causes a SPN 3914 code?

SPN 3914 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 3914 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3914 active.

How do I fix SPN 3914?

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 3914

J1939 SPN 3914 — Body/Chassis parameter

What it means

J1939 Body/Chassis Parameter Data Not Received or Invalid. This code indicates the Engine Control Module (ECM) is not receiving expected configuration or status data from the Body Controller over the CAN bus.