What causes a SPN 2071 code?

SPN 2071 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 2071 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2071 active.

How do I fix SPN 2071?

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 2071

SPN 2071 - Aftertreatment Diesel Exhaust Fluid Dosing Unit Heated Line

What it means

Indicates an electrical circuit failure, short, or open circuit in the DEF dosing unit heater lines or related heating elements.