P11271A — insulation monitoring level 2 (low-voltage condition)
Quick answer
P11271A indicates that the battery management system detected a more severe insulation fault in the low-voltage condition. The high-voltage system is shut down in a controlled manner, so the car cannot be driven.
What to check first
- Read all stored fault codes with a scan tool and deal with related codes first.
- High-voltage system: do not open or disconnect high-voltage components. Refer the car to a technician qualified for high-voltage work.
Can I still drive?
Do not drive. 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 P11271A
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 P11271A?
Do not drive. 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 P11271A mean?
P11271A indicates that the battery management system detected a more severe insulation fault in the low-voltage condition. The high-voltage system is shut down in a controlled manner, so the car cannot be driven.
What should be checked first for P11271A?
Read all stored fault codes with a scan tool and deal with related codes first. High-voltage system: do not open or disconnect high-voltage components. Refer the car to a technician qualified for high-voltage work.
Which parts are involved in P11271A?
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)P115272Precharge relay will not closeP115372Fast-charge 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.