i08786724
DEF Pressure Is High
Table 39
Diagnostic Trouble Codes for DEF Pressure Is High
J1939
Code
PDL Code
Code Description
(code descriptions may
vary)
Comments
4334-16
E930 (2)
Aftertreatment 1 Diesel Exhaust
Fluid Doser Absolute Pressure :
High - moderate severity (2)
The DCU detects that the DEF pump pressure is above the acceptable range.
The code is logged.
Follow the troubleshooting procedure to identify the root cause of the fault.
Table 40
Required Tools
Tool Part Number
Part Description Qty
A
T400921 Protection Kit 1
Illustration 39 g03790973
Typical view of the Pump and Electronics Unit (PEU)
(1) DEF Pump
(2) DEF pressure line connector
(3) DEF suction line connection
Illustration 40 g03790991
Typical view of the DEF tank
(4) DEF tank header unit
(5) DEF suction line connection
(6) DEF return Line connection
Complete the procedure in the order in which the
steps are listed.
UENR4469-36 103
Symptom Troubleshooting
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