What causes a SPN 3452 code?

SPN 3452 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 3452 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3452 active.

How do I fix SPN 3452?

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 3452

J1939 SPN 3452 — Body/Chassis parameter

What it means

Aftertreatment #1 Configuration (SCR Configuration) - This code indicates a mismatch or communication error regarding the body/chassis configuration parameters sent over the J1939 data link, specifically relating to how the SCR system is integrated with the chassis.