What causes a SPN 3065 code?

SPN 3065 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 3065 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3065 active.

How do I fix SPN 3065?

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 3065

SPN 3065 FMI 0/3/4 - Exhaust Gas Pressure Bank 1

What it means

This fault indicates that the Exhaust Gas Pressure (EGP) sensor is reporting values outside of the expected range, potentially signaling a plugged sensor tube or internal failure.