ATS Warning Lamps

Warning lamps in the driver's message center alert the driver of situations with the ATS.

• An illuminated DPF lamp indicates a regen is needed. See Fig..

• A slow, 10-second flashing of the high exhaust system temperature (HEST) lamp alerts the driver that a parked regen is in progress, but the exhaust temperatures are still relatively cool. It also indicates that the high-idle speed is being controlled by the engine software, not the driver. See Fig..

• A steadily illuminated HEST lamp alerts the operator of high exhaust temperatures when vehicle speed is below 5 mph (8 km/h) while it is performing an automatic regen, and during a parked regen.

• An illuminated DEF warning lamp in the gauge, indicates that the DEF tank should be refilled at the next opportunity.