What causes a SPN 3258 code?

SPN 3258 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 3258 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3258 active.

How do I fix SPN 3258?

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 3258

SPN 3258 Aftertreatment 1 Intake Gas Oxygen Sensor Heater Control

What it means

Indicates a circuit failure or high resistance in the heater element of the inlet NOx (Oxygen) sensor. The sensor requires high internal temperatures to accurately measure exhaust gas composition.