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Searched for 4203 Bmw Fault Code - The fault code 4203 in a BMW refers to a problem with the glow plug control unit. This code indicates that there is no communication between the control unit and the vehicle's data interface.
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Video tutorial > Bmw
BMW Fault Code 4203: Glow Plug Control Unit Communication Issue: The fault code 4203 in a BMW refers to a problem with the glow plug control unit. This code indicates that there is no communication between the control unit and the vehicle's data interface. Possible causes for this code include a faulty glow plug control module, poor connection or wiring issues, a faulty relay, or a lack of pre-glow period. It is recommended to check the continuity of the glow plugs and replace any faulty wires. In some cases, replacing the glow plug control unit may be necessary.

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