B2582: Passenger OCS Circuit Open
The B2582 code indicates that the Restraints Control Module (RCM) has detected an open circuit in the passenger seat Occupant Classification System (OCS). This system evaluates the presence and weight of an occupant to regulate deployment of the front passenger airbag. An open circuit interrupts the electrical signal between the sensor (integrated into the seat cushion) and the RCM, typically causing the passenger airbag to be permanently disabled and triggering the airbag warning light, compromising occupant protection in a collision.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty passenger seat occupant classification sensor (OCS) - internally open or damaged
- Disconnected, corroded, or high-resistance connectors in the wiring harness under the seat
- Broken, cut, or chafed wires in the occupant detection circuit due to repeated seat movement
- Bent, corroded, or pushed-back pins in the sensor or RCM connectors
- Defective occupant classification module (in vehicles with a separate module from the RCM)
3. Symptoms You Will Notice
- Airbag warning light illuminated on the dashboard
- Passenger airbag deactivated (may show 'Passenger Airbag Off' indicator)
- Possible diagnostic trouble code B2582 stored in the RCM
4. Step-by-Step Diagnosis
Scan the RCM for codes and verify B2582 is present.
Visually inspect the wiring and connectors under the passenger seat for damage, corrosion, or disconnection.
Check for bent or corroded pins in the OCS sensor and RCM connectors.
Measure resistance and voltage at the OCS sensor circuit per manufacturer specifications.
If wiring and connectors are okay, test the OCS sensor itself (may require a scan tool with OCS data or a known-good replacement).
If the vehicle has a separate occupant classification module, test or replace it as needed.
5. Frequently Asked Questions
Is it safe to drive?▼
Driving is possible, but the passenger airbag will be disabled, increasing injury risk for a passenger in a crash. It is recommended to have the issue repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether the fix involves cleaning connectors, repairing wiring, or replacing the OCS sensor or module.