What causes a SPN 461 code?

SPN 461 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 461 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 461 active.

How do I fix SPN 461?

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 461

J1939 SPN 461 — Fuel/Air parameter

What it means

Fuel Pressure - Input Voltage Above Normal, or Grounded Circuit. This code indicates the Engine Control Module (ECM) is detecting fuel pressure delivery issues or a sensor signal outside of expected parameters.