What causes a SPN 6237 code?

SPN 6237 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 6237 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 6237 active.

How do I fix SPN 6237?

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 6237

Cummins fault code 6237

What it means

Engine Fuel Injector Cylinder 1 - Current Below Normal or Open Circuit. The ECM has detected an open circuit or high resistance on the cylinder 1 injector circuit.