B1A8A on 2019-2020 Audi e-tron — Charge Door 1 LIN Actuator - Communication / Path-of-Movement Fault
1 vehicles · 1 makes
How to diagnose and fix B1A8A: 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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B1A8A 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 B1A8A mean?
B1A8A stands for "Charge Door 1 LIN Actuator - Communication / Path-of-Movement Fault." J1050 has detected either a LIN communication failure with the charging door 1 actuator, or that the actuator did not complete its expected travel (path-of-movement fault) when commanded to open or close the flap.
What are the most common causes of B1A8A?
The most common causes of B1A8A are: Moisture ingress through a cracked charging-indicator connector bridging ground and LIN (Audi TSB 2071343), Mechanically stuck or iced charge flap preventing full actuator travel, Failed door actuator motor, Outdated onboard-charger software (Audi TSB 2062631). The specific cause varies by vehicle.
How much does it cost to fix B1A8A?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by B1A8A?
Au7o has documented B1A8A 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.