What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
3Original wording in English
NISSAN
Reported code forms P0603
MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin has been amended. The publication date has been revised to include the latest models and model years. No other changes have been made. Please discard…
NISSAN
Reported code forms P0603
MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin has been amended. The publication date has been revised to include the latest models and model years. No other changes have been made. Please discard…
NISSAN
Reported code forms P0603
NISSAN; MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin has been amended. The APPLIED VEHICLES section has been revised. No other changes have been made. Please discard previous versions of this bulletin.
Check vehicle applicability
1A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Nissan | NISSAN | Year not specified |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.