Caterpillar Fault Code
Free · no signupSPN 168 FMI 1
Slow Crank / ECM Reset
System
Electrical
Symptom
Slow Crank / ECM Reset
Diagnosis & fix steps
LOGIC: System Voltage Low (<9V).
ACTION: Load test batteries. Check alternator S-terminal.
Red Seal field insights
RED SEAL FIX: Usually high-resistance ground strap between frame and block.
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