What causes a SPN 3424 code?

SPN 3424 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 3424 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3424 active.

How do I fix SPN 3424?

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 3424

J1939 SPN 3424 — Body/Chassis parameter

What it means

The J1939 Aftertreatment 1 Intake Gas Sensor Power Supply configuration or general Body/Chassis parameter mismatch typically indicates a data link configuration error where expected data from the body controller does not match what the engine controller is programmed to receive.