3126B Industrial Engines E025 High Inlet Air Temperature Derate Caterpillar


E025 High Inlet Air Temperature Derate
`
Event E025

Conditions Which Generate This Code:

The Electronic Control Module (ECM) detects inlet air temperature that exceeds the trip point temperature. Information on default settings and ranges for this event can be found in Troubleshooting, "Event Codes".

System Response:

The ECM will log the event.

Possible Performance Effect:

  • The engine power is derated.

Troubleshooting:

There may be a problem with the engine.

Test Step 1. CHECK THE ENGINE'S AIR INLET AND EXHAUST SYSTEMS

  1. Check for a restriction in the air inlet system. A restriction of the air that is coming into the engine can cause high cylinder temperatures. High cylinder temperatures cause higher than normal temperatures in the cooling system.

  2. Check for a restriction in the exhaust system. A restriction of the air that is coming out of the engine can cause high cylinder temperatures.

Results:

    Continue to the next test step.

Test Step 2. CHECK FOR AN EXTREME OPERATING ENVIRONMENT

  1. Consider high ambient temperatures. When ambient temperatures are too high for the rating of the cooling system, there is not enough of a temperature difference between the ambient air and coolant temperatures.

  2. Consider high altitude operation. The cooling capability of the cooling system is reduced at higher altitudes. A pressurized cooling system that is large enough to keep the coolant from boiling must be used.

  3. The engine may be running in the lug condition. When the load that is applied to the engine is too large, the engine will run in the lug condition. When the engine is running in the lug condition, engine rpm does not increase with an increase of fuel. This lower engine rpm causes a reduction in coolant flow through the system.

Expected Result:

A thorough inspection of the engine revealed a problem.

Results:

  • OK - There is a problem with the engine.

    Repair: Repair the problem. Ensure that the repair eliminates the problem.

    STOP

Information System:

3406E, C12, C15 and C18 Marine Engines E017 High Engine Coolant Temperature Warning
3406E, C12, C15 and C18 Marine Engines E015 High Engine Coolant Temperature Derate
2005/01/17 Correction to Engine Speed/Timing Sensor-Calibrate {1912}
3500B Marine Propulsion Engines Heat Exchanger - Inspect
C11 and C13 Engines for Caterpillar Built Machines Electronic Unit Injector - Install
345C Excavator Machine System Specifications Boom Cylinder
12M and 140 Motor Grader Roading the Machine
3508C, 3512C and 3516C Marine Engines Engine Oil Cooler - Assemble
3508C, 3512C and 3516C Marine Engines Engine Oil Cooler - Disassemble
3516B and 3516B High Displacement Engines for 994D and 994F Wheel Loaders Fuel Filter Base - Electric Fuel Priming Pump
Particulate Filter for Stationary Engines in Standby Applications{1091}
3500B Marine Propulsion Engines Auxiliary Water Pump - Inspect
3508C, 3512C and 3516C Marine Engines Crankshaft Rear Seal and Wear Sleeve - Install
3508C, 3512C and 3516C Marine Engines Crankshaft Front Seal and Wear Sleeve - Install
C32 Marine and Marine Generator Set Engines Cooling System - Check - Overheating
3126B Industrial Engines E039 Low Engine Oil Pressure Derate
C27 and C32 Generator Set Engines E057 Low Engine Coolant Level Derate
C27 and C32 Generator Set Engines E059 Low Engine Coolant Level Warning
C0.5, C0.7, C1.1/3011C, C1.5/3013C, C1.6 and C2.2/3024C/3024CT Industrial Engines and Engines for Caterpillar Built Machines Cooling System - Test
G3508B, G3512B, G3512B, G3516B and G3520B Petroleum Engines Crankshaft Rear Seal and Wear Sleeve - Remove
C32 Marine Engines Fuel Level Sensor Circuit - Test
C0.5, C0.7, C1.1/3011C, C1.5/3013C, C1.6 and C2.2/3024C/3024CT Industrial Engines and Engines for Caterpillar Built Machines Piston Ring Groove - Inspect
C32 Marine Engine Sensors and Electrical Components
C9 Urban Transit Bus Engine Fuel Filter Base - Remove and Install