Why does the Audi Q3 show a charger error and fail to charge?

[DeJosiah]

Audi Q3 may show a charger error and fail to charge due to damaged or broken wiring. Reasons for the ammeter returning to zero while driving: During vehicle operation, if the ammeter needle quickly returns to zero, indicating no charging, first ensure the charging circuit connections are secure. Replace the charger if it is malfunctioning. Alternatively, if the battery temperature is excessively high during prolonged driving, potential causes include: battery fatigue damage from extended use, internal battery short circuits, shedding of active material from battery plates reducing capacity, or sulfation of battery plates and hardening of negative plates. Charging fault resolution: First, secure all charging circuit connections and replace the charger if malfunctioning. When the battery cannot accept charge, this indicates an open circuit in the battery. If the battery voltage remains below normal levels with minimal increase during charging, and stays below normal after resting, this confirms an internal battery open circuit.