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.