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 and P11271A
This code concerns a high-voltage or safety-related system. It must be diagnosed and repaired by a technician qualified for that work, so we do not list parts for it here. If your technician has already identified a part, send us the code and the VIN and we will tell you what we can help with.
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.
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 confirm the reference against the VIN, then tell you availability, price and lead time. We ship from China to workshops and distributors across Europe.