Caterpillar Fault Code
Free · no signupE001 (Level 3)
Immediate Shutdown Warning.
System
Cooling
Symptom
Immediate Shutdown Warning.
Diagnosis & fix steps
LOGIC: Critical Overheat (approx. 110°C / 230°F).
ACTION: The ECM may shut down the engine or severely derate to idle. Check water pump flow.
Red Seal field insights
Specs: Level 3 is "Pull Over Now."
PRO-TIP: Use an infrared temp gun at the top and bottom of the radiator. If the bottom is cold and the top is hot, the radiator is plugged internally.
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