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To reset the DPF (Diesel Particulate Filter) light on a Mazda 3, you typically need to use an OBD-II scanner that can clear diagnostic trouble codes. First, connect the scanner to the vehicle's OBD-II port, turn on the ignition, and follow the scanner's prompts to locate and clear the DPF-related codes. After clearing the codes, the DPF light should turn off. If the light persists, ensure the DPF system is functioning properly, as it may require service or regeneration.

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2d ago

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