B1A8A on Audi: How to Diagnose & Fix
Charge Door 1 LIN Actuator - Communication / Path-of-Movement Fault
1 Audi model · 1 documented issue
B1A8A on Audi by model: symptoms, diagnosis and fix
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.
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)
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 on a Audi?
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. On Audi it is documented across 1 model: e-tron.
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(Audi TSB 2071343), Mechanically stuck or iced charge flap preventing full actuator travel, Failed door actuator motor, Outdated onboard-charger software (Audi TSB 2062631).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 on a Audi?
Repair costs vary widely with the root cause and Audi model; each issue on this page carries its own estimate where one is published.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.