DESCRIPTION:
Selective catalyst reduction (SCR) outlet NOx sensor – drift low.

MONITORED PARAMETER:
Engine out NOx.

TYPICAL ENABLING CONDITIONS:
The following must be true for greater than 30 seconds:
1. Fuel mass is 0.
2. Diesel particulate filter (DPF) outlet temperature greater than 200 °C (392°F).
3. Battery voltage greater than 10V DC.
4. Engine Speed 500 to 2100 rpm.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
Five seconds

DASH LAMPS:
MIL

ENGINE REACTION:
None

VERIFICATION:
Parked regeneration