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B00A0 Severity
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
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Code B00A0 stands for Occupant Classification System (OCS).
Children and small passengers can be injured during airbag deployment. The occupant classification system (OCS) is designed to prevent this from happening. To keep small individuals, such as children safe, the OCS prevents the passenger airbag from deploying when needed. The OCS is part of the airbag system, referred to as the supplemental restraint system (SRS).
The OCS identifies passenger size, out of position passengers and the presence of a child seat in the front passenger seat. Typically, an under seat-mounted occupant sensor(s) is used to collect data for the OCS. Information from these sensors is sent to the OCS control module (basically the OCS computer). The OCS control module then sends the information to the main SRS module, referred to as the airbag control module. The airbag module then decides whether the passenger airbag should be deployed in the event of a crash.
Code B00A0 indicates the airbag module has detected a problem with the OCS system.
Airbag / Image source
Code B00A0 is typically caused by one of the following:
Get it diagnosed by a professional
Sometimes B00A0 can pop up intermittently. This is especially true if the code is a history code and not current. Clear the code and see if it returns. If it does, the next step is to perform a visual inspection. A trained eye can check for issues such as broken wires and loose connections. If a problem is found, the issue should be repaired and the code cleared. If nothing is discovered, check for technical service bulletins (TSBs). TSBs are recommended diagnostic and repair procedures put out by the vehicle manufacturer. Finding a related TSB can greatly reduce diagnostic time.
Code B00A0 often sets when the airbag module cannot communicate with the OCS module. Before inspecting the sensor or control module, the OCS circuit should be checked. A professional will usually do this using a digital multimeter (DMM). Since the OCS module is located under the seat, it's common for its wiring to get caught in the seat tracks or damaged by debris. The OCS module circuit should also be checked directly to ensure the module has good power and ground. Any problems should be repaired as needed and the code cleared.
Although some vehicle manufacturers don't suggest it, it may be possible to test the OCS sensors. This can be done using a DMM. Some sensors can also be checked using a diagnostic scan tool connected to the vehicle's diagnostic port. The sensor circuit should also be checked for proper power and ground. Repairs should be made as needed and code cleared.
The repair information from many manufacturers jumps right to module replacement for code B00A0. Usually, the suggestion is to replace the OCS module first. Then, if that doesn't work, the next step is to replace the airbag module. However, it's a good idea to check the software in both modules before replacement. In some cases, if there's a TSB or an update, the module may be able to be reprogrammed instead of replaced.
There are often two-digit sub-codes associated with B00A0. These codes indicate what type of circuit defect the control module has detected. Here is an example from a Ford vehicle:
