B1A8F on Audi: How to Diagnose & Fix
LED Module Charging Socket Door 1 - Communication Malfunction
1 Audi model · 1 documented issue
B1A8F 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 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)
B1A8F 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 B1A8F mean on a Audi?
B1A8F stands for "LED Module Charging Socket Door 1 - Communication Malfunction." The onboard charger has lost LIN communication with the LED charge-level indicator module in charging socket door 1. This is the counterpart to B1A89 for the primary (driver-side on US cars) charge port. On Audi it is documented across 1 model: e-tron.
What are the most common causes of B1A8F?
The most common causes of B1A8F are: Cracked charge-level-indicator connector letting moisture create a ground/LIN bypass (Audi TSB 2071343), Corrosion on the indicator connector contact pins, Failed LED indicator module, Damaged LIN wiring to the charge-door assembly. The specific cause varies by vehicle.
How much does it cost to fix B1A8F 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.
Looking for B1A8F on a different make?
View B1A8F across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.