What causes a SPN 361 code?

SPN 361 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 361 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 361 active.

How do I fix SPN 361?

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 361

J1939 SPN 361 — Fuel/Air parameter

What it means

J1939 SPN 361 is a generic parameter group for Fuel/Air ratios, often indicating a mismatch between the commanded fuel delivery and the actual air intake or fuel pressure observed.