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Sentra FE+SV
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Engine Control System (Diagnostic Codes & Symptom Tests)
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DTC/Circuit Diagnosis
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DTC P0603: ECM
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DTC Logic
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DTC Detection Logic
DTC Detection Logic
DTC No.
CONSULT screen terms (Trouble diagnosis content)
DTC detecting condition
Possible cause
P0603
ECM BACK UP CIRCUIT [Internal control module keep alive memory (KAM) error]
Malfunction in the internal back up RAM of ECM.
Malfunction in the internal EEP-ROM system of ECM.
ECM power supply
ECM