Deutz Fault Code
Free · no signupCode 8-1-3 / SPN 168 FMI 1
Multiple Random Faults / Hard Start
System
Electrical
Symptom
Multiple Random Faults / Hard Start
Diagnosis & fix steps
LOGIC: EMR Controller Main Battery Supply Voltage Low (<9V on 12V / <18V on 24V).
ACTION: Test batteries under load. Inspect main engine ground ring terminals at chassis frame. Check alternator charging voltage output.
Red Seal field insights
Voltage Threshold: Low system supply voltage degrades reference regulation inside the EMR, causing widespread false sensor fault logging.
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