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DESCRIPTION:
Diesel exhaust fluid (DEF) purge pressure high.
MONITORED PARAMETER:
Diesel exhaust fluid (DEF) purge pressure.
TYPICAL ENABLING CONDITIONS:
1. Engine idle 1 minute.
2. Engine off.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met.
TYPICAL DURATION:
30 counts
DASH LAMPS:
MIL
VERIFICATION:
SCR quantity test.
NOTE: After repair is complete, fault must be cleared using the diagnostic service tool.
PROBABLE CAUSES:
1. DEF pressure sensor failure.
2. DEF pressure sensor connector/harness.
3. Check air line routing for the Pressure Limiting Valve (PLV), DEF pump, and metering unit for kinks/blockage.
4. DEF return line blocked/kinked.
5. DEF nozzle failure.
6. DEF nozzle supply line blocked/kinked.
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