B00A0 on Nissan
Occupant Classification System (Subfault)
B00A0 on Nissan vehicles indicates occupant classification system (subfault). Au7o has documented this code across 1 Nissan model — most commonly on Versa. This SRS code refers to a fault in the Occupant Classification System (OCS), which detects the size, weight, and presence of the front passenger (including an empty seat or a child seat) to decide whether and how forcefully the passenger airbag should deploy. The airbag module sets this code when the OCS sensors, weight mat, or related wiring report a fault. With this code active, the passenger airbag may be incorrectly enabled or disabled, so it should be diagnosed for safety. Typical repair costs on Nissan range from $150 to $1,200, depending on the specific model and root cause.
Common Causes of B00A0
- •Faulty occupant classification / weight sensor mat in the seat
- •Damaged wiring or connector under the passenger seat
- •OCS module needing recalibration after seat service
- •Aftermarket seat covers or modifications affecting the sensor
- •Corroded or loose connector
- •Faulty OCS or airbag (SRS) control module
- •Poor ground connection
B00A0 on Nissan by Model
Nissan Versa(1 issue)
- Passenger Occupant Classification Sensor (OCS) Mat Failure — Passenger Airbag Stays Disabled2007-2022
The Versa's NISSAN Advanced Air Bag System weighs the front passenger via an occupant classification sensor mat and bladder built into the passenger seat cushion, plus a seat-belt tension sensor. The pressure mat's printed circuit traces crack from repeated seat loading, and the harness that runs under the seat frame chafes or corrodes at the connector. When the OCS control unit sees an implausible or open-circuit reading it fails safe and leaves the 'PASSENGER AIR BAG OFF' telltale illuminated with a normal-sized adult seated — meaning the passenger front airbag will not deploy in a crash. Owners report the light behaving erratically first (going out only when the passenger shifts position) before staying on permanently. Nissan's service remedy is often a re-zero/reflash of the OCS control unit rather than parts, so a good number of cars are fixed without a seat teardown, but a genuinely failed mat requires the seat cushion assembly.
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View B00A0 across all makes →Frequently Asked Questions
What does B00A0 mean on Nissan?▼
B00A0 stands for "Occupant Classification System (Subfault)." This SRS code refers to a fault in the Occupant Classification System (OCS), which detects the size, weight, and presence of the front passenger (including an empty seat or a child seat) to decide whether and how forcefully the passenger airbag should deploy. The airbag module sets this code when the OCS sensors, weight mat, or related wiring report a fault. With this code active, the passenger airbag may be incorrectly enabled or disabled, so it should be diagnosed for safety. On Nissan specifically, this code is documented across 1 model.
What causes B00A0 on Nissan vehicles?▼
Common causes on Nissan: Faulty occupant classification / weight sensor mat in the seat, Damaged wiring or connector under the passenger seat, OCS module needing recalibration after seat service, Aftermarket seat covers or modifications affecting the sensor, Corroded or loose connector. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B00A0 on a Nissan?▼
Repair costs on Nissan range from $150 to $1,200, depending on the specific model and root cause.
Which Nissan models have B00A0 documented?▼
Au7o has documented B00A0 on 1 Nissan model: Versa.