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B18 Owner's 2020-2025 Sentra owner information B18 Service 2020-2025 Sentra Workshop manual B17 Owner's 2013-2019 Sentra owner documentation B17 Service 2013-2019 Sentra service information

Nissan Sentra B18 (2020-2025) Service Manual: Three Way Catalyst

Three Way Catalyst

If a large amount of unburned fuel flows into the catalyst, the catalyst temperature will be excessively high. To prevent this, follow the instructions.

  • Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst.

  • When checking for ignition spark or measuring engine compression, make tests quickly and only when necessary.

  • Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to the catalyst.

Do not place the Nissan Sentra vehicle on flammable material. Keep flammable material off the exhaust pipe and the three way catalyst.

    General Precautions
    General Precautions Do not operate the engine for an extended period of time without proper exhaust ventilation. Keep the work area well ventilated and free of any inflammable m...
    Fuel
    Fuel MR20DD Use unleaded regular gasoline with an octane rating of at least 87 AKI (Anti-Knock Index) number (Research octane number 91). CAUTION: Only Nissan Sentra vehicles wi...

    Other materials:

    Fuel Pump
    Component Inspection Component Inspection CHECK FUEL PUMP Turn ignition switch OFF. Disconnect “fuel level sensor unit and fuel pump” harness connector. Check the resistance between ...

    Removal and Installation
    Av Control Unit Exploded View Exploded View 1. AV control unit bracket (LH) 2. AV control unit ...

    Types of tires
    WARNING When changing or replacing tires on your Nissan Sentra, always ensure that all four tires are of the same type (Summer, All Season, or Snow) and the same construction. A NISSAN dealer can assist you in selecting the correct tire type, size, speed rating, and availability suitabl ...