The powertrain control module keep-alive memory has an error.
Informational only. Consult a qualified mechanic.
Check battery and connections. May need PCM reflash or replacement.
The P0603 OBD-II diagnostic trouble code (DTC) indicates: internal control module kam error. This is a medium-severity powertrain code that your vehicle's onboard diagnostics system triggers when the powertrain control module keep-alive memory has an error. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
Track codes on your vehicle — sign up free
Log OBD-II codes, get maintenance reminders, and keep your complete service history.