Global Market Fault Code
Free · no signupU0100
No Crank / Dead Instrument Gauges
System
Communication
Symptom
No Crank / Dead Instrument Gauges
Diagnosis & fix steps
LOGIC: Lost Communication with ECM / PCM "A".
ACTION: Check master engine management fuses. Trace the main 12V ignition relay feeds and check the CAN High/Low bus network data integrity.
Red Seal field insights
Data Highway: The central body control module or gateway box logs a total loss of cyclic data link packets from the primary powertrain brain chip.
Same code keeps coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
Read before you touch anything
- This is general reference information, not a repair manual. It is for trained, qualified technicians.
- Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
- Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
- You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
- Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.
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