Caterpillar Fault Code
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Engine Hesitation.
System
Not specified
Symptom
Engine Hesitation.
Diagnosis & fix steps
LOGIC: Throttle Actuator #1 Control out of range.
ACTION: Clean the throttle plate of soot; check the return spring tension.
Red Seal field insights
On C-series engines, oil mist from the crankcase breather gunk up the throttle plate, causing it to "stick" and trip the code.
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