Nissan Altima Owners Manual: Anti-freeze

In the winter when it is anticipated that the temperature will drop below 32F (0C), check the anti-freeze to assure proper winter protection.

For details, see Engine cooling system in the Maintenance and do-it-yourself section of this manual.

    Freeing a frozen door lock
    To prevent a door lock from freezing, apply deicer through the key hole. If the lock becomes frozen, heat the key before inserting it into the key hole or use the remote keyless entry function on ...

    Battery
    If the battery is not fully charged during extremely cold weather conditions, the battery fluid may freeze and damage the battery. To maintain maximum efficiency, the battery should be checked reg ...

    Other materials:

    P1421 Cold start control
    Description ECM controls ignition timing and engine idle speed when engine is started with prewarming up condition. This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions. DTC Logic DTC DETECTION LOGIC NOTE: If DTC P1421 is displayed wit ...

    Charging system
    Wiring Diagram - Coupe Wiring Diagram - Sedan ...

    Headlamp (HI) circuit
    Description The IPDM E/R (intelligent power distribution module engine room) controls the headlamp high relay based on inputs from the BCM over the CAN communication lines. When the headlamp high relay is energized, power flows through fuses 48 and 49, located in the IPDM E/R. Power then flo ...