ENGINE AR-CORE 1605725 - Caterpillar

Probable Causes
Diagnostic codes
High ambient air temperature
Intake air restriction and/or high altitude
Intake air from a heated areaRecommended Actions
Diagnostic Codes
Use one of the following methods to check for active diagnostic codes:
The electronic service tool
The display on the control panelElectronic Service Tool
Connect the electronic service tool to the diagnostic connector.
Check for active diagnostic codes on the electronic service tool.
Investigate any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code". Display on the Control PanelNote: The following procedure is only applicable if the application is equipped with a display on the control panel.
Check the display on the control panel for active diagnostic codes.
Troubleshoot any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code". High Ambient Air Temperature
Determine if the ambient air temperature is within the design specifications for the cooling system.
When the ambient temperature exceeds the capability of the cooling system, take the following actions:
Operate the engine at a reduced load
Operate the engine at a reduced speed
When possible, modify the cooling system in order to make the system suitable for local conditions. Intake Air Restriction and/or High Altitude
Low air pressure at the air intake can be caused by a restriction in the air intake or a high altitude. When the pressure of the intake air is low, the turbochargers (if equipped) work harder in order to achieve the desired intake manifold pressure. This increases intake air temperature.Measure the intake manifold pressure while the engine is operating under load. For specific data, refer to the Technical Marketing Information (TMI) for the engine.Intake Air Restriction
Check for blocked air filters. Check for obstructions in the air intake.
Replace the air filters or remove the obstruction from the air intake. High Altitude
Make sure that the settings for the engine are correct for the altitude.Intake Air from a Heated Area
Ensure that the air inlet system is not receiving air from a heated area.
If necessary, relocate the air supply to the intake manifold to the outside of the engine enclosure.
Check for air leaks in the pipe between the air inlet and the intake manifold.