On Board Diagnosis Logic
WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTING CONDITION AND POSSIBLE CAUSE
| DTC No. |
Trouble diagnosis name |
DTC detecting condition |
Possible cause |
P0603
0603 |
ECM power supply circuit |
ECM back-up RAM system does not function properly. |
- Harness or connectors [ECM power supply (back-up) circuit is open or shorted.]
- ECM
|