What causes a SPN 3465 code?

SPN 3465 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 3465 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3465 active.

How do I fix SPN 3465?

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 3465

SPN 3465 FMI 3/4 Aftertreatment 1 SCR Intake Gas Temperature Open/Short

What it means

This fault indicates that the engine control module (ECM) has detected an electrical circuit failure (high or low voltage) in the Selective Catalytic Reduction (SCR) intake temperature sensor.