B2581 on 2011-2019 Ford Explorer — Passenger Seat Occupant Detection Circuit Short To Ground
1 vehicles · 1 makes · $25-$350 repair
Most Reported On
B2581 is an OBD-II diagnostic trouble code meaning “Passenger Seat Occupant Detection Circuit Short To Ground.” The Restraints Control Module / Occupant Classification System monitors the front passenger occupant detection sensor circuit and has detected that circuit shorted to ground, so the module can no longer determine whether the passenger seat is occupied or how it is loaded. Because passenger airbag suppression depends on that input, the system defaults to a fail-safe state. Note that this is a restraints code, not an HVAC code — the catalogue issue citing it (Ford Explorer blend door actuator) does not match this code's actual meaning. This code is most commonly reported on 2011-2019 Ford Explorer, with repair costs ranging from $25 to $350.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
B2581 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does B2581 mean?
B2581 stands for "Passenger Seat Occupant Detection Circuit Short To Ground." The Restraints Control Module / Occupant Classification System monitors the front passenger occupant detection sensor circuit and has detected that circuit shorted to ground, so the module can no longer determine whether the passenger seat is occupied or how it is loaded. Because passenger airbag suppression depends on that input, the system defaults to a fail-safe state. Note that this is a restraints code, not an HVAC code — the catalogue issue citing it (Ford Explorer blend door actuator) does not match this code's actual meaning.
What are the most common causes of B2581?
The most common causes of B2581 are: Damaged or shorted occupant classification sensor mat / bladder in the passenger seat cushion, Chafed or pinched wiring under the passenger seat (seat travel damage, items caught under the seat), Corroded or moisture-contaminated seat connector after a spill or water intrusion, Failed Occupant Classification System module or Restraints Control Module, Aftermarket seat covers, seat heaters or wiring modifications. The specific cause varies by vehicle.
How much does it cost to fix B2581?
Repair costs for B2581 range from $25 to $350, depending on the vehicle and root cause.
Which vehicles are affected by B2581?
Au7o has documented B2581 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.