U112100 on Audi
Communication Fault (Extended Manufacturer Specific)
U112100 on Audi vehicles indicates communication fault (extended manufacturer specific). Au7o has documented this code across 2 Audi models — most commonly on e-tron, S8. Extended manufacturer-specific network communication fault code.
Common Causes of U112100
- •Module communication error
- •CAN bus issue
- •Software incompatibility
- •Wiring fault
- •Module requiring update
U112100 on Audi by Model
Audi e-tron(2 issues)
- 2019-2023 e-tron Air-Suspension Warning with J1135 Communication Fault - Diagnosis Required2019-2023
Audi TSB 2059363/5 covers a legacy e-tron air-suspension malfunction when suspension controller J775 stores C1260F0 for no communication with compressor-control unit J1135 or U112100 with symptom code 262400 for a missing message. This is an electrical communication path; the bulletin does not establish leaking air lines, worn struts, height-sensor failure, compressor burnout or ball-joint wear as one common defect.
- 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.
Audi S8(1 issue)
- 2020-2024 S8 Air-Suspension Malfunction with J1135 Communication Fault - Diagnosis Required2020-2024
Audi TSB 2059363/4 covers an air-suspension malfunction on 2020-2024 S8 vehicles when the suspension controller stores C1260F0 for no communication with the compressor control unit or U112100 with symptom code 262400 for a missing message. The bulletin identifies the electrical path between level-control module J775 and compressor-control unit J1135, not a general leaking-strut or worn-compressor population.
Looking for U112100 on a different make?
View U112100 across all makes →Frequently Asked Questions
What does U112100 mean on Audi?▼
U112100 stands for "Communication Fault (Extended Manufacturer Specific)." Extended manufacturer-specific network communication fault code. On Audi specifically, this code is documented across 2 models.
What causes U112100 on Audi vehicles?▼
Common causes on Audi: Module communication error, CAN bus issue, Software incompatibility, Wiring fault, Module requiring update. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U112100 on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have U112100 documented?▼
Au7o has documented U112100 on 2 Audi models: e-tron, S8.