Volvo XC90 2015-2021 Owners Manual / Starting and driving / Emission controls

Volvo XC90: Starting and driving / Emission controls

Three-way catalytic converter

  • Keep your engine properly tuned. Certain engine malfunctions, particularly involving the electrical, fuel or distributor ignition systems, may cause unusually high threeway catalytic converter temperatures. Do not continue to operate your vehicle if you detect engine misfire, noticeable loss of power or other unusual operating conditions, such as engine overheating or backfiring. A properly tuned engine will help avoid malfunctions that could damage the three-way catalytic converter.
  • Do not park your vehicle over combustible materials, such as grass or leaves, which can come into contact with the hot exhaust system and cause such materials to ignite under certain wind and weather conditions.
  • Excessive starter cranking (in excess of one minute), or an intermittently firing or flooded engine can cause three-way catalytic converter or exhaust system overheating.
  • Remember that tampering or unauthorized modifications to the engine, the Engine Control Module, or the vehicle may be illegal and can cause three-way catalytic converter or exhaust system overheating. This includes: altering fuel injection settings or components, altering emission system components or location or removing components, and/or repeated use of leaded fuel.

NOTE

Unleaded fuel is required for vehicles with three-way catalytic converters.

Heated oxygen sensors

The heated oxygen sensors monitor the oxygen content of the exhaust gases. Readings are fed into a control module that continuously monitors engine functions and controls fuel injection. The ratio of fuel to air into the engine is continuously adjusted for efficient combustion to help reduce harmful emissions.

    Octane rating

    Volvo requires premium fuel (91 octane1 or higher) for all T5, T6 and T8 engines, and recommends AKI 93 for optimal performance and fuel economy. See decal examples in illustrations 1 and 2...

    Overheating of engine and transmission

    In certain driving conditions, such as driving in mountainous areas or hot weather, there is a risk of the engine or transmission overheating, especially when carrying heavy loads...

    Other information:

    Volvo XC90 2015-2021 Owners Manual: Activating and deactivating Hill Descent Control using the function button


    (Option/accessory.) There is a function button for assistance on steep gradients with Hill Descent Control in the center display's Function view if the vehicle is not equipped with a drive mode control in the tunnel console. Selecting Hill Descent Control in the center display's Function view HDC only works at low speeds...

    Volvo XC90 2015-2021 Owners Manual: HD Radio™


    HD Radio is a brand name registered by the DTS, Inc.1. They are the developer of a broadcasting technology called IBOC or In Band On Channel, which refers to the method of transmitting a digital radio broadcast signal centered on the same frequency as the AM or FM station's present frequency...

      Categories

      Door and seat belt reminders

      This system is intended to remind occupants to buckle their seat belts and to alert the driver if a door, hood or other opening (trunk, sunroof, etc.) is open.

      Graphics in the instrument panel

      Volvo XC90. Door and seat belt reminders

      Graphics in the instrument panel with various types of warnings. The warning colors for the doors/tailgate vary depending on the vehicle's speed.

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