LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Nissan-Datsun
>>
2014
>>
Sentra S, Standard Trans
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Control System (Diagnostic Codes & Symptom Tests)
>>
DTC/Circuit Diagnosis
>>
DTC P0603: ECM
>>
DTC Logic
>>
DTC Detection Logic
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
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