Instrument Panel Lamps

The EPA10/GHG14/GHG17 instrument panel lamps are explained below:

Amber Warning Lamp

Lamp	Lamp Name	Description	Results
	Amber Warning Lamp (AWL)	Indicates a fault with the engine controls.	Vehicle can be driven to end of shift. Call for service.
Lamp Solid		Lamp Flashing
At the start of every ignition cycle (bulb check). When an electronic system fault occurs. (Fault should be diagnosed as soon as possible.)		Diagnostic request switch is used to activate the AWL to flash inactive codes. (EPA07 function only.) Flashes last 90 seconds before idle shutdown if programmed for override. Flashes when idle shutdown or the optimized idle shutdown occurs.

Red Stop Lamp

Lamp	Lamp Name	Description	Results
	Red Stop Lamp (RSL)	Indicates a major engine fault that may result in engine damage. Engine derate and/or shutdown sequence will be initiated.	Move the vehicle to the nearest safe location and shut down the engine. Call for service.
Lamp Solid		Lamp Flashing
At the start of every ignition cycle (bulb check). A potential engine damaging fault is detected.		Flashes when engine protection shutdown occurs. Diagnostic request switch is used to activate the RSL to flash active codes. (EPA07 function only).

Diesel Particulate Filter Regeneration Lamp

Lamp	Lamp Name	Description	Results
	Diesel Particulate Filter Regeneration Lamp	Solid yellow indicates a regeneration is required. Blinking yellow, derate and/or shutdown are possible as soot load continues to increase. Lamp will shut off during parked regeneration.	Lamp Solid - regeneration is required. Lamp Flashing- regeneration is required immediately.
Lamp Solid		Lamp Flashing
At the start of every ignition cycle (bulb check). Regeneration is required.		When a regeneration is required immediately (if the lamp flashing is ignored), a derate and/or shutdown could occur.

High Exhaust System Temperature Lamp

Lamp	Lamp Name	Description	Results
	High Exhaust System Temperature (HEST) Lamp	Lamp is yellow. Indicates exhaust temperature is above a preset limit and unit is operating at low vehicle speed (below 5 mph [8 kph]). When the engine speed is elevated for a parked regeneration, lamp will flash once every 10 seconds.	Vehicle can be driven. Lamp solid for an extended period (Longer than 40 Minutes) - call for service.
Lamp Solid		Lamp Flashing
At the start of every ignition cycle (bulb check). Vehicle speed is less than 5 mph and the Diesel Particulate Filter (DPF) outlet temperature is greater than 525° C (977° F).		Flashes every 10 seconds when the Selective Catalytic Reduction ( SCR Catalyst) is not up to temperature

Malfunction Indicator Lamp

Lamp	Lamp Name	Description	Results
	Malfunction Indicator Lamp (MIL)	Yellow lamp Indicates a failure of an Emission Control device. May illuminate at the same time as the Amber Warning Lamp.	Vehicle can be driven to end of the shift. Call for service.
Lamp Solid		Lamp Flashing
At the start of every ignition cycle (a bulb check) For any emission related fault (light out when the fault is inactive)		Never flashes

Fuel Filter Restriction Sensor Lamp: Fuel Filter Failed

Lamp	Lamp Name	Description	Results
	Fuel Filter Restriction Sensor (FFRS) Lamp	Yellow lamp Indicates that the fuel filter is restricted and needs to be serviced. May illuminate at the same time as the Malfunction Indicator Lamp (MIL) and Amber Warning Lamp (AWL)	Service soon
Lamp Solid		Lamp Flashing
At the start of every ignition cycle (a bulb check). Fuel filter needs service.		Never

Water-In-Fuel Lamp (WIF)

Lamp	Lamp Name	Description	Results
	Water-In-Fuel (WIF) Lamp	Yellow lamp indicates that the fuel water separator has reached its capacity and needs to be drained.	Engine water separator must be drained or an engine derate will occur.
Lamp Solid		Lamp Flashing
At the start of every ignition cycle (a bulb check). Water separator has reached it maximum capacity.		Never