The car 120W fast charge cannot be fast charged for the following reasons:
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1. The fast charge protocol is not compatible: The fast charge function requires the compatibility of the fast charge protocol between the mobile phone, charger and vehicle charging interface. If either of them does not support fast charging, fast charging cannot be implemented. Check that your phone, charger, and vehicle all support the same fast charge protocol.
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2. Charging cable problems: Make sure you are using a data cable that supports fast charging. Some charging cables only support ordinary charging and cannot be quickly charged.
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3. Poor contact of the charging port: check the connection of the vehicle charging port. If the charging port is dirty or loose, it may cause abnormal charging. Wipe the charging port with a clean cloth and make sure it is securely connected.
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4. Charger failure: If there is a problem with the charger itself, it may also lead to no fast charging. Try replacing other fast charger to see if the problem is solved.
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5. Vehicle power management system failure: The vehicle power management system is responsible for monitoring and adjusting the charging speed. If the power management system fails, fast charging may not be possible. Please contact the car manufacturer or professional maintenance personnel for inspection and repair.
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6. Mobile phone battery problems: If the mobile phone battery is aging or damaged, it may also lead to the inability to quickly charge. Try replacing your phone battery to see if the problem is resolved.
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Please check the above causes to find the problem and fix it. If the problem still cannot be resolved, it is recommended to contact a professional for inspection and repair.