What causes a SPN 837 code?

SPN 837 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 837 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 837 active.

How do I fix SPN 837?

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 837

J1939 SPN 837 — Engine Management parameter

What it means

SPN 837 refers to the 'Actual Maximum Available Engine - Percent Torque.' It indicates the ECM is receiving or calculating a torque limit parameter that is out of range or invalid based on current engine configuration.