P0603 on the 2016 Nissan Maxima
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| NTB16018 | 2021-05-10. Service bulletin. IF YOU CONFIRM The MIL is "ON" with DTC P0603 (ECM BACK UP/CIRCUIT). ACTION 1. Confirm that the battery voltage is 11 volts, or more, with the ignition ON (engine OFF, not running). 2. Erase DTC 3. Perform DTC confirmation steps in the Service Procedure. 4. Confirm 1st trip DTC P0603 is not stored. NOTE: P0603 is often the result of low battery voltage, discharged battery or battery terminal disconnections. Please see this bulletin for furtner details. |
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| NTB16-018D | 2021-05-08. Service bulletin. MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin has been amended. See AMENDMENT HISTORY on page 3. Please discard previous versions of this bulletin. |
| NTB16-018c | 2018-05-21. Service bulletin. MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin does NOT apply to Titan equipped with Cummins V8 Diesel engine. This bulletin has been amended to add a NOTE in the Applied Vehicles. No other changes have been made. Please discard previous versions of this bulletin. |
3 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.