i08786731
DEF Pressure Is Low
Table 42
Diagnostic Trouble Codes for DEF Pressure Is Low
J1939 Code PDL Code
Code Description
Comments
4334-18
E931 (2)
Aftertreatment #1 SCR Dosing Re-
agent Absolute Pressure : Low - mod-
erate severity (2)
Diesel Exhaust Fluid (DEF) system pressure dropped below the
acceptable threshold during dosing
Follow the troubleshooting procedure to identify the root cause of the problem.
Table 43
Required Tools
Tool Part Number
Part Description Qty
A
T402192
Tool Gp
1
Complete the procedure in the order in which the
steps are listed.
UENR4469-36 107
Symptom Troubleshooting
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