When the high exhaust system temperature lamp is illuminated what does it indicate?
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 does def temperature light mean?
High Exhaust System Temperature (HEST) Lamp Indicates that high exhaust temperatures may exist due to aftertreatment regeneration. Aftertreatment DPF Lamp Indicates that the aftertreatment Diesel Particulate Filter (DPF) requires regeneration.
Why is my exhaust temperature high?
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.
Why does my Cummins ISX low boost high exhaust temps?
If you run down south for the week, truck will no due this all week come north and it will do this all the time. 35 degrees or less and it does it. Changed out Exhaust gas pressure sensor, did not fix. Any ideas? check the turbo see if the shaft rocks enough to hit the housing also check the boost sensor see if its plugging up
What does a high exhaust system temperature ( Hest ) lamp mean?
High Exhaust System Temperature (HEST) Lamp 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.
What do the lights on a Cummins Engine mean?
For Cummins On-Highway, Heavy Duty and MidRange Engines With Aftertreatment. Lamp Description Driver Action Check Engine Lamp Lights up to warn the driver to seek service soon. Flashing Check Engine Lamp Will flash for 30 seconds at key ON if maintenance is due. Malfunction Indicator Lamp (MIL)
When does the high exhaust system temperature ( DPF ) lamp illuminates?
Once the DPF reaches approximately 840° F (450° C), the High Exhaust System Temperature (HEST) Lamp illuminates. When regeneration is complete, the engine returns to idle. If any of the above conditions change, manual regeneration deactivates and the engine returns to idle. If the DPF Lamp illuminates again, manual regeneration must be restarted.