Posts Tagged: P0603 Infiniti

P0603 Infiniti

May 6, 2019

Diagnose and fix P0603 Infiniti trouble code Infiniti has issued a service bulletin #ITB16-008b to address a P0603 trouble code issue that may appear on all 2015 and later Infiniti vehicles. The P0603 (ECM BACK UP/CIRCUIT) trouble code will be stored and the check engine warning light will be on. P0603 Infiniti diagnostic procedure Infiniti recommends starting your diagnostic work with a battery voltage check. Make sure battery terminals are clean and tight. Battery voltage must be at least 11-volts with the IGN on but engine OFF. Next, erase the … Read More