ENGINE OPERATION - Operating Instructions Malfunction Indicator Lamp Diesel Particulate Filter (DPF) Warning Lamp This warning symbol will appear when the DPF needs to be regenerated and then also during the regeneration cycle. This icon may also appear if the system is attempting to automatically regenerate while the vehicle is in Power Take Off operation mode. Keep vehicle a safe distance from combustible items. 1 WARNING Illuminates when an engine emissions failure has occurred. The vehicle can be safely driven but should be serviced to correct the problem. The situation should not be considered an emergency.
In some cases, the Malfunction Indicator Lamp (MIL) will activate in conjunction with the High Exhaust System Temperature (HEST), Diesel Particulate Filter (DPF) and Diesel Exhaust Fluid (DEF) warning lamps. Temperature of the tail pipe, exhaust pipe, the diesel particular filter (DPF) / selective catalytic reduction (SCR) de- vice and surrounding components in- cluding enclosures and steps, will be elevated during and shortly after a re- generation event or normal vehicle op- eration when engine is under high or heavy loading. Engine aftertreatment system includes a diesel particulate filter and DPF warning lamp. If the High Exhaust System Temperature (HEST) warning lamp is on:
Do not park in an area of combustible vapors or materials. You must keep combustibles at least 1.5 m (5 ft) away from the exhaust (outlet) stream (as it exits the tail pipe) while the HEST lamp is illuminated. Always park your vehicle outside. Failure to do so could ignite an explosion or harm bystanders which could result in serious injury. Do not park in an area where people are close by. You must keep NOTE The malfunction indicator lamp (MIL) will illuminate if the on-board diagnos- tics (OBD) system detects a possible emissions system failure. The vehicle should be brought in for service at the next opportunity to ensure the condi- tion is corrected.
High Exhaust System Temperature (HEST) Warning Lamp Engine aftertreatment system includes a high exhaust system temperature (HEST) warning lamp. Y53-1181-1K1 (08/2018) 15