NOTE: This code sets when the diesel exhaust fluid (DEF) tank temperature does not increase 0.5°C (0.9°F) within 300 seconds after the DEF tank coolant valve has bn commanded on.

DESCRIPTION:DEF tank temperature – low.

MONITORED PARAMETER:DEF tank temperature.

TYPICAL ENABLING CONDITIONS:1. Coolant valve commanded open.2. Coolant temperature greater than 70°C (158°F).3. Ambient temperature less than -1°C (30°F) as measured by the ACM.

MONITOR SEQUENCE:None

EXECUTION FREQUENCY:Continuous when enabling conditions met.

TYPICAL DURATION:30 minutes

DASH LAMPS:MIL

VERIFICATION:Parked regeneration

NOTE: If any cooling system codes present, fix this first.

NOTE: If codes 3363-3, 3363-4, or 3363-5 active, fix those first.

PROBABLE CAUSES:1. Coolant line from engine to DEF pump.2. DEF tank header assy.3. DEF tank header assy harness/connector.