B0053
Deployment Commanded with Deployment Loop DTCs Present
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Code B0053 is a latched deployment code indicating that the airbag control module commanded restraint device deployment during a collision, but deployment loop faults (DTCs) were present at the time. This means the SRS system attempted to deploy, but some restraint devices may not have fired properly because of pre-existing or crash-induced electrical faults in their circuits.
This code is more concerning than B0051 because it indicates that the SRS system may not have fully protected the occupants during the collision. Some airbags or pretensioners may have failed to deploy due to wiring damage, corroded connectors, or other electrical issues that were either present before the crash or caused by the crash itself. Like B0051 and B0052, this is a permanently latched code that cannot be cleared.
Repair requires complete replacement of the airbag control module, all deployed devices, and all impact sensors. Additionally, the technician must identify and repair whatever deployment loop faults were present — this may involve tracing and repairing damaged wiring harnesses throughout the vehicle. For used vehicle buyers, B0053 during a pre-purchase inspection is a red flag that warrants extremely thorough investigation of the vehicle's collision and repair history, as it indicates both a significant crash and potential SRS system issues that preceded or complicated the crash event.
Severity
Symptoms
- •Airbag warning light permanently illuminated
- •Some airbags may have deployed while others may not have due to faults
- •Visible collision damage to the vehicle
- •SRS system is fully disabled and non-functional
- •Additional warning indicators related to specific airbag circuits may be present
Likely Causes
The most common scenario: the vehicle was in a crash, but the airbag control module had already detected faults in one or more deployment loops before the crash occurred. The system deployed whatever devices it could, but some may have failed to deploy due to pre-existing electrical faults.
During the collision itself, wiring to some airbag devices may have been severed or shorted before the control module could command deployment. The crash forces can damage wiring faster than the deployment command travels through the circuit.
In rare cases, the airbag control module itself may have sustained damage during the crash that impaired some of its deployment driver circuits while others functioned normally.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Replace the airbag control module (this is a latched code that cannot be cleared)
- Replace all deployed airbag modules, pretensioners, and impact sensors
- Thoroughly inspect and repair all SRS wiring harnesses
- Address any pre-existing deployment loop faults that were present before the crash
- Perform a complete SRS system verification after all repairs