DESCRIPTION:
Diffuser heater open circuit.
MONITORED PARAMETER:
Diffuser Heater
TYPICAL ENABLING CONDITIONS:
Always Enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Always Enabled
TYPICAL DURATION:
Two seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 10%
VERIFICATION:
Engine Idle (1 minute).
NOTE: If code not active, release vehicle to customer.
PROBABLE CAUSES:
1. DEF metering unit diffuser heater.
2. DEF metering unit diffuser heater connector/harness.
3. DEF doser valve.
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