B1A89 on 2019-2020 Audi e-tron — LED Module Charging Socket Door 2 - Communication Malfunction
1 vehicles · 1 makes
How to diagnose and fix B1A89: most-reported vehicles
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Audi e-tron · 2019–2020
Audi TSB 2071343/1 covers a charging door that will not open when its button is pressed on 2019 e-tron quattro and an early 2020 e-tron Sportback quattro VIN range. A crack at the charge-level-indicator connector can admit moisture, causing oxidation or a LIN communication fault between the charging-door components and high-voltage charger. The door may then open only with the manual release. Matching DTCs include B1A8FF0, B1A89F0, B1A8AF3 and B1A88F3.
Common Symptoms
- Charging door does not open when its button is pressed
- Charging door opens only with the manual release
- B1A8FF0, B1A89F0, B1A8AF3 or B1A88F3 in high-voltage charger J1050
How to Fix
Use the owner-manual release only as directed to gain access; high-voltage-area diagnosis and repair belong with an Audi-qualified technician. Confirm model/VIN applicability and the matching DTC, then inspect the charge-level-indicator connector for cracks, moisture and oxidation. Audi’s procedure seals an undamaged connector or replaces the damaged charge-door unit and seals the updated connector as required. The former 93H6 service action expired in 2023, so confirm current coverage before work and do not order the former actuator or unrelated electrical parts.
Owner tips & cautions
- TipPhotograph the warning and ask the technician to record the exact DTC and connector condition before replacing the charge-door unit.
Sources for this issue (2)
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B1A89 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1A89 mean?
B1A89 stands for "LED Module Charging Socket Door 2 - Communication Malfunction." J1050 cannot communicate with the LED status/charge-level indicator module built into charging socket door 2. The charge-state light ring is the same LIN node as the door hardware, so this fault usually appears together with the charge-door actuator codes.
What are the most common causes of B1A89?
The most common causes of B1A89 are: Crack at the charge-level-indicator connector admitting moisture, creating a ground-to-LIN bypass (Audi TSB 2071343), Oxidised connector pins at the charging indicator, Failed LED indicator module, Open or shorted LIN wire in the charge-door harness. The specific cause varies by vehicle.
How much does it cost to fix B1A89?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by B1A89?
Au7o has documented B1A89 across 1 vehicle models from 1 manufacturers: Audi.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.