When an "EV Function Restricted" warning suddenly appears in your new energy vehicle, follow this structured plan:
🔥 Step 1: Assess the Situation
In 80% of cases, it's a temporary system protection, and a restart can resolve it. However, if you notice a burning smell, fluid leakage, or the warning persists for over 2 hours, power off immediately and seek assistance.
🚨 Self-Help Guide for Key Scenarios
1️⃣ Battery Thermal Management Anomaly
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Triggered by extreme heat exposure or low temperatures (<10°C).
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Solution: Move the vehicle to a shaded area or underground garage and let it sit for 2-3 hours. Use sunshades and pre-cool remotely (tests show a temperature drop of 18°C in 47°C environments).
2️⃣ Charging System Fault
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Caused by a loosely connected charging gun or non-standard charging stations.
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Key Actions: Ensure a "click" sound indicating proper locking. After rain, check for water accumulation at the port (e.g., BYD PTC water seepage case).
3️⃣ Sensor False Alarm
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Caused by dust on wheel speed sensors or loose connections in current sensors.
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Action: Clean magnetic heads with alcohol wipes and check wiring harness connections (self-inspection cost < 500 RMB).
💡 Standard Troubleshooting Procedure
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Monitor the dashboard: Turn off high-power devices when the temperature warning light is on.
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Physical inspection: Touch the charging port to check the interlock circuit status.
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Engineering mode: Access vehicle-specific guides through official channels (ensure system version compatibility).
⚠️ Hazardous Operations Warning
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Frequently plugging/unplugging the charging gun during heavy rain.
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Forcing a restart more than 3 times (risks damaging ECU logs).
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Using non-genuine OBD devices to clear codes (may lock the powertrain).
🛡️ Proactive Prevention Strategies
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Charging Management: Use home charging stations regularly, limit fast charging to ≤3 times per month, and avoid leaving the vehicle at low charge for >3 days.
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Driving Optimization: Enable energy recovery on long descents; allow the motor to cool for 5 minutes after hard acceleration.
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Seasonal Maintenance: Preheat the battery in winter, park in shaded spots in summer, and check battery health every 20,000 km.
📱 Emergency Highway Protocol
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Turn on hazard lights and pull over safely (avoid sudden braking).
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Take photos of the error codes and contact online technical support.
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Do not repeatedly attempt to start the vehicle while waiting for rescue
