What causes a SPN 352 code?

SPN 352 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 352 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 352 active.

How do I fix SPN 352?

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 352

J1939 SPN 352 — Fuel/Air parameter

What it means

SPN 352 is a generic J1939 fault indicating a signal mismatch or out-of-range value for a Fuel/Air parameter, most commonly associated with Measured Fuel Pressure or Rail Pressure depending on the specific manufacturer's implementation.