What causes a SPN 1871 code?

SPN 1871 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 1871 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 1871 active.

How do I fix SPN 1871?

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 1871

SPN 1871 Engine Variable Geometry Turbocharger Actuator Temperature

What it means

Indicates that the internal electronics of the Variable Geometry Turbocharger (VGT) actuator have exceeded a safe operating temperature threshold.