B1A88 on Audi
Charge Door 2 LIN Actuator - Communication Malfunction
B1A88 on Audi vehicles indicates charge door 2 lin actuator - communication malfunction. Au7o has documented this code across 1 Audi model — most commonly on e-tron. The high-voltage battery charger J1050 has lost or corrupted LIN-bus communication with the electric actuator that latches and releases charging door 2. Without valid actuator feedback the module will not command the door open.
Common Causes of B1A88
- •Crack in the charging-indicator connector allowing moisture in, bridging the ground pin and the LIN pin (Audi TSB 2071343 - 2019 e-tron quattro / early 2020 e-tron Sportback)
- •Corroded contact pins in the charge-door connector
- •Failed charge-door actuator motor
- •Damaged LIN wiring in the charge-door harness
B1A88 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 B1A88 across all makes →Frequently Asked Questions
What does B1A88 mean on Audi?▼
B1A88 stands for "Charge Door 2 LIN Actuator - Communication Malfunction." The high-voltage battery charger J1050 has lost or corrupted LIN-bus communication with the electric actuator that latches and releases charging door 2. Without valid actuator feedback the module will not command the door open. On Audi specifically, this code is documented across 1 model.
What causes B1A88 on Audi vehicles?▼
Common causes on Audi: Crack in the charging-indicator connector allowing moisture in, bridging the ground pin and the LIN pin (Audi TSB 2071343 - 2019 e-tron quattro / early 2020 e-tron Sportback), Corroded contact pins in the charge-door connector, Failed charge-door actuator motor, Damaged LIN wiring in the charge-door harness. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1A88 on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have B1A88 documented?▼
Au7o has documented B1A88 on 1 Audi model: e-tron.