What causes a SPN 3848 code?

SPN 3848 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 3848 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3848 active.

How do I fix SPN 3848?

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 3848

J1939 SPN 3848 — Body/Chassis parameter

What it means

J1939 Body/Chassis Parameter Mismatch or Out of Range. This code indicates that the body controller is sending or receiving configuration data that does not match the expected values stored in the vehicle's master control module.