Dtcs And Mil Status - Launch Creader Professional 909 User Manual

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LAUNCH
Catalytic
Converter
Once per trip
Monitor
O
Sensor
2
Once per trip
Monitor
O
Sensor
2
Once per trip
Heater Monitor
EGR Monitor
Once per trip
EVAP system
Once per trip
Monitor
Secondary Air
System
Once per trip
Monitor
NMHC Monitor Once per trip
Nox Adsorber
Once per trip
Monitor
Boost Pressure
System
Once per trip
Monitor
Exhaust Gas
Once per trip
Sensor Monitor
PM Filter
Once per trip
Monitor

2.7 DTCs and MIL Status

When the vehicle's on-board computer detects a failure in an emissions-related
component or system, the computer's internal diagnostic program assigns a
diagnostic trouble code (DTC) that points to the system (and subsystem) where
the fault was found. The diagnostic program saves the code in the computer's
memory. It records a "Freeze Frame" of conditions present when the fault was
found, and lights the Malfunction Indicator Lamp (MIL). Some faults require
detection for two trips in a row before the MIL is turned on.
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