What causes a SPN 2711 code?

SPN 2711 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 2711 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2711 active.

How do I fix SPN 2711?

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 2711

J1939 SPN 2711 — Aftertreatment/Emissions parameter

What it means

SCR High Temperature Differential or Efficiency Fault. This code typically monitors the temperature rise or efficiency across the SCR catalyst to ensure the reduction of NOx is occurring within specified parameters.