2012 Nissan P0603 Error Code: Causes and What to Do After Battery Replacement
Hello, Yesterday my engine stalled and wouldn't restart. I called a roadside service who checked the battery and found it was old and dead — they replaced it. The diagnostic showed no other issues, and the alternator was functioning properly. After the replacement, the car started immediately and ran smoothly. While driving away, the check engine light activated. I took it to an oil change shop where a diagnostic revealed code P06003. My question is: Should I take my 2012 Nissan to an auto repair shop for further inspection? Or could this code have been triggered simply by disconnecting the battery? Thanks for your help! P.S. The vehicle model and fault code (P0603) are critical for accurate diagnosis, as this code relates to memory or data bus issues in engine control systems.
It's possible that the P0603 code was triggered by disconnecting the battery. Try clearing the code using an OBD2 scanner and monitor if it returns during normal driving. If the issue persists, a professional diagnosis at an auto shop is recommended to rule out underlying sensor or memory module problems.