What causes a SPN 3462 code?

SPN 3462 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 3462 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3462 active.

How do I fix SPN 3462?

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 3462

SPN 3462 FMI 3/4/5 Aftertreatment 1 SCR Intake Gas Temperature

What it means

This fault indicates a failure in the Selective Catalytic Reduction (SCR) intake temperature sensor circuit, signaling either an open circuit, short to ground, or short to voltage.