B1A8F on Audi
LED Module Charging Socket Door 1 - Communication Malfunction
B1A8F on Audi vehicles indicates led module charging socket door 1 - communication malfunction. Au7o has documented this code across 1 Audi model — most commonly on e-tron. 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.
Common Causes of B1A8F
- •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
B1A8F on Audi by Model
Audi e-tron(1 issue)
- 2019-2020 e-tron Charging Door Will Not Open: VIN and Connector Diagnosis Required2019-2020
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.
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View B1A8F across all makes →Frequently Asked Questions
What does B1A8F mean on 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 specifically, this code is documented across 1 model.
What causes B1A8F on Audi vehicles?▼
Common causes on Audi: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1A8F on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have B1A8F documented?▼
Au7o has documented B1A8F on 1 Audi model: e-tron.