B1A87 on 2021 Audi e-tron — Function Button Charge Door 2 Faulty
1 vehicles · 1 makes
How to diagnose and fix B1A87: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Audi e-tron · 2021–2021
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.
Common Symptoms
- AC or DC charging is interrupted
- DC charging does not start or stops at some stations
- Charging-flap button is inoperative or the flap does not open
- Auxiliary heating is activated through the app but the vehicle does not pre-heat
How to Fix
Record whether the failure is AC, DC or station-specific and have J1050 scanned before parts. If the vehicle has the matching condition and software level 0070, Audi directs an SVM update to software 0079 or higher. After the update, reproduce the concern and follow the guided test plan for any new active DTC. Do not infer hardware failure merely because one charging mode works, and do not order the former charger, 12-volt battery, relay, meter or portable EVSE from this card.
Owner tips & cautions
- TipBring the failed station, date and charging mode to the diagnosis and ask for the J1050 software level and full DTC list before authorizing hardware.
Sources for this issue (1)
Find B1A87 by make
Browse every documented model and issue for your make.
B1A87 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 B1A87 mean?
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.
What are the most common causes of B1A87?
The most common causes of B1A87 are: Outdated onboard-charger software (level 0070) per Audi TSB 2061788, Failed charge-door 2 push-button switch, Moisture/corrosion at the charge-door connector, LIN bus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. The specific cause varies by vehicle.
How much does it cost to fix B1A87?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by B1A87?
Au7o has documented B1A87 across 1 vehicle models from 1 manufacturers: Audi.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.