What causes a SPN 6328 code?

SPN 6328 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 6328 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 6328 active.

How do I fix SPN 6328?

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 6328

Cummins fault code 6328

What it means

Injector Solenoid Driver Cylinder 1 - Current Below Normal or Open Circuit. This indicates the ECM has detected an open circuit or high resistance on the fuel injector #1 circuit.