What does code P0603 mean?
An error is detected in the keep alive memory (KAM) that stores learned ECU data.
OBD-II Code
P0603 — Internal Control Module Keep Alive Memory (KAM) Error
An error is detected in the keep alive memory (KAM) that stores learned ECU data.
Common symptoms
- Loss of learned settings
- unstable idle
- harsh driving behavior
Possible causes
- Battery disconnected
- poor ground connection
- failing ECU
Initial recommendation
Check system voltage, battery terminals, perform KAM reset and inspect ECU condition.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0603 with your vehicle's actual symptoms for more complete diagnostic guidance.
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