What causes a SPN 2836 code?

SPN 2836 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 2836 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2836 active.

How do I fix SPN 2836?

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 2836

J1939 SPN 2836 — Aftertreatment/Emissions parameter

What it means

Aftertreatment 1 DEF Tank Level Sensor - Voltage Below Normal, or Shorted to Low Source. This code indicates the ECM is detecting a signal voltage from the DEF level sensor that is lower than the minimum calibrated threshold.