What causes a SPN 341 code?

SPN 341 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 341 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 341 active.

How do I fix SPN 341?

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 341

J1939 SPN 341 — Fuel/Air parameter

What it means

J1939 SPN 341 refers to the Fuel/Air Parameters. It is a configuration-based fault indicating that the ECM is receiving invalid data or is improperly programmed regarding how it calculates or reports fuel flow and air intake metrics over the data link.