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What does the fault code B12FE mean in BYD vehicles?

1 Answers

OColin

07/30/25 4:20am

BYD vehicle fault code B12FE indicates a fan malfunction. Below is relevant information about automotive fault codes: Causes and solutions for the fault: Automotive fault codes are diagnostic codes generated by the vehicle's ECU (Engine Control Unit) when a malfunction occurs. If any component or circuit fails, the ECU commands the engine fault indicator to illuminate. Most automotive fault codes are triggered by sensor failures or poor sensor performance, but some mechanical faults cannot be read by the ECU and require professional inspection and repair at a 4S shop. When a car engine malfunctions, the diagnostic computer will display fault codes, enabling technicians to accurately identify the faulty component for repair. Classification of automotive fault codes: Intermittent faults: Can be cleared if they no longer occur; Actual faults: Can only be cleared after proper repair.

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