What causes a SPN 3469 code?

SPN 3469 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 3469 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3469 active.

How do I fix SPN 3469?

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 3469

SPN 3469 — Engine Fuel Lift Pump

What it means

The ECM has detected a current out of range (short or open circuit) in the electrical circuit for the engine's electric fuel lift pump.