What do I do if my exhaust temperature light comes on?
The High Exhaust System Temperature (HEST) Lamp illuminates to indicate that high exhaust temperatures may exist due to aftertreatment regeneration. When this lamp is illuminated, ensure that the exhaust pipe outlet is not directed at any surface or material that will melt, burn, or explode.
What causes high exhaust temperatures in diesel engines?
MAN Diesel & Turbo Fouling of the turbine side of the turbocharger is a common cause for high exhaust gas temperatures. The sequence of events is often as follows: → Fouling of turbine (coke deposit) → Bad turbocharger performance → Lower airflow and charge air pressure → Higher exhaust gas temperatures.
What does a flashing aftertreatment DPF lamp mean?
Indicates that high exhaust temperatures may exist due to aftertreatment regeneration. Aftertreatment DPF Lamp Indicates that the aftertreatment Diesel Particulate Filter (DPF) requires regeneration. Flashing Aftertreatment DPF Lamp Aftertreatment DPF requires regeneration. Engine power may be reduced automatically.
Why does Regen light flash when truck is parked?
It means that the exhaust is at high temperature due to extra regen speed which occurs when the truck is traveling at low rates or is parked. If this lamp flashes it means that parked regen is in progress and that system temperature is not up to par yet.
What does the malfunction indicator light on a Freightliner mean?
The Malfunction Indicator Lamp/Check Engine: The malfunction indicator lamp is commonly called the check engine light. This error lamp is based on an the engine-management system and usually indicates a malfunction somewhere in the engine.
What does a flashing red Engine Lamp mean?
Indicates that engine must be stopped as soon as it is safe to do so. Flashing Red Stop Engine Lamp Indicates driver has 30 seconds to stop vehicle safely before automatic engine shutdown (if the Engine Protection Shutdown feature is enabled). High Exhaust System Temperature (HEST) Lamp