What causes a SPN 3341 code?

SPN 3341 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 3341 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3341 active.

How do I fix SPN 3341?

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 3341

J1939 SPN 3341 — Body/Chassis parameter

What it means

SPN 3341 typically refers to a generic 'Auxiliary Input' or 'Body/Chassis' parameter received via the J1939 network that has failed, is out of range, or is providing an invalid signal to the Engine Control Module.