Technical Definition:
(Internal Control Module) Keep Alive Memory (KAM) Error
Trouble Code: P0603
Address: 0x0603
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Address: 0x0603
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:
Possible Causes:
- Battery terminal corrosion or loose connections
- Keep Alive Power (KAPWR) circuit wire routing
- Open wire in the KAPWR circuit
- Damaged PCM, water intrusion / internal fault
- Charging system fault
- Ignition system fault causing secondary ignition voltage inference
- Internal PCM program fault
Possible Symptoms:
Internal Control Module Keep Alive Memory Error
Possible Solutions:
OBD-II Trouble Code Type:
Diagnostic Step:
Tech Notes:
– Loose or poor battery terminal connection
– Low battery charge
– ECM power supply circuit is open or shorted
– ECM Programing
– Faulty ECM
Specific Makes:
– Engine may not start