B142A on 2021-2023 Ford Bronco — Restraint System Ignition Voltage Supply Fault
1 vehicles · 1 makes
How to diagnose and fix B142A: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Ford Bronco · 2021–2023
A documented Bronco safety issue involved front seat belt pretensioners that may not deploy properly in a crash. This defect increases injury risk because the restraint system may not tighten the belt as intended during impact. The issue is recall-documented and has been discussed by owners receiving recall notices and dealer repairs.
Common Symptoms
- Recall notice received
- Airbag or seat belt warning light
- Concern about restraint system readiness
- Stored SRS fault codes
How to Fix
Check VIN status for open recall campaigns and have the pretensioner assemblies inspected and replaced by a Ford dealer if applicable. If the airbag light is on, scan the RCM/SRS system for stored faults before replacing components. After repair, confirm the restraint system passes self-test and no warning indicators remain.
Sources for this issue (1)
Find B142A by make
Browse every documented model and issue for your make.
B142A code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B142A mean?
B142A stands for "Restraint System Ignition Voltage Supply Fault." B142A is a manufacturer-specific body/restraint code that, on several applications (e.g., Nissan), indicates a problem with the ignition/voltage supply to the airbag diagnosis (SRS) sensor unit, meaning the supply voltage is out of the expected range. The restraint module needs stable voltage to function, so this can illuminate the airbag warning light and compromise SRS readiness. Because it involves the safety-restraint system, it should be diagnosed promptly. Exact meaning varies by maker, so confirm with vehicle-specific data.
What are the most common causes of B142A?
The most common causes of B142A are: Faulty ignition switch or ignition-supply circuit, Damaged or corroded wiring to the SRS/airbag module, Loose or corroded connector at the restraint module, Weak battery or low charging-system voltage, Faulty airbag (SRS) diagnosis sensor unit, Blown fuse or poor ground in the supply circuit. The specific cause varies by vehicle.
How much does it cost to fix B142A?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by B142A?
Au7o has documented B142A across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.