B10AA on Ford
Driver Seatbelt Pretensioner Circuit Fault
B10AA on Ford vehicles indicates driver seatbelt pretensioner circuit fault. Au7o has documented this code across 1 Ford model — most commonly on Mustang Mach-E. B10AA is a manufacturer-specific body/restraint code generally indicating a fault in a seatbelt pretensioner (squib/firing loop) circuit, often described as the driver lap pretensioner circuit being shorted or cross-linked to another firing loop. The airbag/restraint control module monitors these circuits and detected an electrical condition that could prevent correct pretensioner operation in a crash. Because this is a safety-restraint code the airbag light is usually illuminated. Exact wording varies by maker, so confirm with vehicle-specific service data.
Common Causes of B10AA
- •Faulty seatbelt pretensioner (squib) assembly
- •Damaged or chafed wiring in the pretensioner circuit
- •Shorted or cross-connected firing-loop wiring
- •Corroded or loose connector at the seatbelt buckle/retractor
- •Faulty airbag/restraint control module
- •Improper repair or clockspring/connector issue
B10AA on Ford by Model
Ford Mustang Mach-E(1 issue)
- 12V Battery Drain Causing No-Start and Dead Vehicle2021-2025
The Mustang Mach-E 12V auxiliary battery drains prematurely, leaving the vehicle completely inoperable. Unlike ICE vehicles, the Mach-E cannot be jump-started in the traditional sense when the 12V dies — the vehicle cannot even unlock its doors or engage the HV system. The 12V battery charges from the main HV battery via a DC-DC converter, but software bugs can prevent proper charging when the vehicle is parked. OTA updates have addressed some scenarios, but the issue recurs for many owners.
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View B10AA across all makes →Frequently Asked Questions
What does B10AA mean on Ford?▼
B10AA stands for "Driver Seatbelt Pretensioner Circuit Fault." B10AA is a manufacturer-specific body/restraint code generally indicating a fault in a seatbelt pretensioner (squib/firing loop) circuit, often described as the driver lap pretensioner circuit being shorted or cross-linked to another firing loop. The airbag/restraint control module monitors these circuits and detected an electrical condition that could prevent correct pretensioner operation in a crash. Because this is a safety-restraint code the airbag light is usually illuminated. Exact wording varies by maker, so confirm with vehicle-specific service data. On Ford specifically, this code is documented across 1 model.
What causes B10AA on Ford vehicles?▼
Common causes on Ford: Faulty seatbelt pretensioner (squib) assembly, Damaged or chafed wiring in the pretensioner circuit, Shorted or cross-connected firing-loop wiring, Corroded or loose connector at the seatbelt buckle/retractor, Faulty airbag/restraint control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B10AA on a Ford?▼
Repair costs vary widely depending on the root cause and specific Ford model.
Which Ford models have B10AA documented?▼
Au7o has documented B10AA on 1 Ford model: Mustang Mach-E.