RecallGuide.ca
    VehiclesUpdated Jan 3, 2026NOVA BUSOfficial source

    Nova Bus LFS recall in Canada: Engine software may cause excess ammonia

    Share:

    In plain language

    This recall affects certain 2021 Nova Bus LFS vehicles in Canada. A programming problem could cause too much diesel exhaust fluid to be injected into the exhaust system. This could lead to higher levels of ammonia in the exhaust emissions, which could cause injury. You can check if your vehicle is included and book a repair using the official notice.

    What to do

    • Check your VIN using the official notice.
    • Contact your dealer or manufacturer to schedule the free repair.
    • Avoid running the engine in a confined space without an exhaust extraction system.

    Get alerts for recalls like this

    Get email alerts when new recalls affect products in this category.

    Categories (optional)

    No spam. Unsubscribe anytime. We only email when there's a relevant recall.

    Affected products

    • LFS

      Model: LFS

    Why this matters

    Exposure to elevated levels of ammonia could cause injury

    Do I have this product?

    This recall only applies to specific products. Follow the steps below to check.

    1. 1

      Check the product name

      Make sure your product name matches one of the affected products listed above.

    2. 2

      Check the model number

      Model numbers are typically on the product label or packaging.

      Affected models: LFS

    If your product matches one or more of the details above, it may be affected by this recall.

    If your product does not match these details, it is not affected by this recall.

    When in doubt, always check the official notice.

    Want alerts if similar products are recalled in Canada?

    Frequently Asked Questions

    Why was this product recalled?

    Exposure to elevated levels of ammonia could cause injury

    What should consumers do?

    Check your VIN using the official notice. Contact your dealer or manufacturer to schedule the free repair. Avoid running the engine in a confined space without an exhaust extraction system.

    Where was the product sold?

    This product was sold in Canada. For specific retailers or distribution areas, please check the official recall notice linked on this page.

    Is there a health risk?

    Yes, there may be a health risk. Exposure to elevated levels of ammonia could cause injury

    When was this product recalled?

    This product was recalled on June 15, 2021.

    Is the NOVA BUS brand affected by this recall?

    Yes, NOVA BUS products are affected by this recall. This recall affects certain 2021 Nova Bus LFS vehicles in Canada. A programming problem could cause too much diesel exhaust fluid to be injected into the exhaust system. This could lead to higher levels of ammonia in the exhaust emissions, which could cause injury. You can check if your vehicle is included and book a repair using the official notice.