What causes a SPN 3737 code?

SPN 3737 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 3737 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3737 active.

How do I fix SPN 3737?

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 3737

J1939 SPN 3737 — Body/Chassis parameter

What it means

Engine Idle Shutdown Request (from Body/Chassis Controller). This code indicates that a body-side module is requesting an engine shutdown or that there is a communication error regarding body-related parameters.