U100087 — lost communication with the vehicle control unit
Quick answer
U100087 indicates that the battery management system lost communication with the vehicle control unit. The warning lamp lights and a fault code is stored.
What to check first
- Read all stored fault codes with a scan tool and deal with related codes first.
- Check whether other modules on the same network also report communication faults; one module offline can set codes in several others.
Can I still drive?
Have it inspected before further driving. If in doubt, park the car and ask a technician — a fault that limits power or shuts the high-voltage system down will not clear by itself.
Parts that fix U100087
Confirm the reference against your VIN before ordering — the same fault can sit in different hardware depending on the build.
| Part | Aiways OE ref. | |
|---|---|---|
| Traction battery assembly (53/63 kWh) | — | Find part |
| High-voltage harness | — | Find part |
| BMS / shunt current sensor | — | Find part |
Frequently asked questions
Can I drive an Aiways U5 with U100087?
Have it inspected before further driving. If in doubt, park the car and ask a technician — a fault that limits power or shuts the high-voltage system down will not clear by itself.
What does U100087 mean?
U100087 indicates that the battery management system lost communication with the vehicle control unit. The warning lamp lights and a fault code is stored.
What should be checked first for U100087?
Read all stored fault codes with a scan tool and deal with related codes first. Check whether other modules on the same network also report communication faults; one module offline can set codes in several others.
Which parts are involved in U100087?
Traction battery assembly (53/63 kWh), High-voltage harness, BMS / shunt current sensor.
Other Battery Management System (BMS) codes for the Aiways U5
P11011DShunt current out of rangeP111892Cell temperature too highP112413Pack voltage lostP11241Ainsulation monitoring level 1 (DC charging)P11251Ainsulation monitoring level 2 (DC charging)P11261Ainsulation monitoring level 1 (low-voltage condition)P11271Ainsulation monitoring level 2 (low-voltage condition)P115272Precharge relay will not close
Need the part or a second opinion?
Send the fault code and your VIN — we will confirm the reference, availability and price, and ship from China to workshops and distributors across Europe.