B1A87 on Audi
Function Button Charge Door 2 Faulty
B1A87 on Audi vehicles indicates function button charge door 2 faulty. Au7o has documented this code across 1 Audi model — most commonly on e-tron. Same diagnostic as B1A86 but for the second charging door on vehicles equipped with two charge ports. J1050 has detected a faulty or implausible signal from the charge-door 2 release button and has disabled the electric flap release on that side.
Common Causes of B1A87
- •Outdated onboard-charger software (level 0070) per Audi TSB 2061788
- •Failed charge-door 2 push-button switch
- •Moisture/corrosion at the charge-door connector
- •LIN bus wiring fault between charge door 2 and J1050
B1A87 on Audi by Model
Audi e-tron(1 issue)
- 2021 e-tron Charging Interruptions with Onboard-Charger Software 0070 - Diagnosis Required2021
Audi TSB 2061788/2 covers model-year 2021 e-tron quattro and e-tron Sportback vehicles with specified AC/DC charging interruptions, charging-flap operation problems, or an app request for auxiliary heating that does not pre-heat the vehicle when matching DTCs are stored in high-voltage battery charger control module J1050. Audi attributes the documented condition to onboard-charger software and identifies old software level 0070, not a proven failed charger module.
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View B1A87 across all makes →Frequently Asked Questions
What does B1A87 mean on Audi?▼
B1A87 stands for "Function Button Charge Door 2 Faulty." Same diagnostic as B1A86 but for the second charging door on vehicles equipped with two charge ports. J1050 has detected a faulty or implausible signal from the charge-door 2 release button and has disabled the electric flap release on that side. On Audi specifically, this code is documented across 1 model.
What causes B1A87 on Audi vehicles?▼
Common causes on Audi: Outdated onboard-charger software (level 0070) per Audi TSB 2061788, Failed charge-door 2 push-button switch, Moisture/corrosion at the charge-door connector, LIN bus wiring fault between charge door 2 and J1050. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1A87 on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have B1A87 documented?▼
Au7o has documented B1A87 on 1 Audi model: e-tron.