What causes a SPN 3553 code?

SPN 3553 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 3553 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3553 active.

How do I fix SPN 3553?

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 3553

J1939 SPN 3553 — Body/Chassis parameter

What it means

Aftertreatment 1 Hydrocarbon Doser Purge Air Valve - Voltage Below Normal, or Shorted to Low Source. This code specifically relates to the air valve used to purge diesel fuel from the dosing line into the exhaust to prevent clogging.