What Does B00B7 Mean?
This code indicates the Body Control Module (BCM) has detected a fault in the driver seat occupant position sensor circuit A. This sensor is part of the occupant classification system that determines seat position and weight distribution, typically used for airbag deployment optimization and seat memory functions. The subfault designation suggests an internal sensor issue or signal abnormality rather than a complete circuit failure.
Common Causes
40%
Faulty or damaged seat position sensor mat or pressure sensor embedded in seat cushion
30%
Corroded or damaged wiring harness connector under driver seat due to moisture or physical damage
20%
Broken or chafed wires in the seat track area from repeated seat movement
10%
Failed Body Control Module or seat control module with corrupted calibration data
Diagnostic Steps
1
Step 1: Perform visual inspection of driver seat area, checking for aftermarket seat covers, objects wedged in seat, or visible damage to seat cushion that could interfere with sensor operation
2
Step 2: Move driver seat fully forward and backward while inspecting wiring harness under seat for chafing, breaks, or damage at movement points; check connector security and pin condition for corrosion or bent terminals
3
Step 3: Using a digital multimeter, backprobe the sensor connector (with sensor connected) to measure voltage supply (typically 5V reference) and ground integrity; compare readings to manufacturer specifications
4
Step 4: Disconnect seat position sensor connector and measure resistance across sensor terminals; resistance should change smoothly when pressure is applied to different seat areas (typical range 500-5000 ohms depending on position)
5
Step 5: If sensor tests normal, monitor live data stream for position sensor voltage output while applying controlled pressure to various seat zones; output should vary smoothly without dropouts or erratic readings
6
Step 6: Clear codes, perform BCM/seat module relearn procedure if available, test drive with varied seat positions, and verify code does not return; if code persists with known-good sensor, suspect control module fault
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a fault in the driver seat occupant position sensor circuit A. This sensor is part of the occupant classification system that determines seat position and weight distribution, typically used for airbag deployment optimization and seat me...
The most common cause of B00B7 (Driver Seat Occupant Position Sensor "A" (Subfault)) is: Faulty or damaged seat position sensor mat or pressure sensor embedded in seat cushion
Typical repair costs for B00B7 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive as this does not disable critical safety systems, however airbag deployment optimization may be affected and airbag warning light may illuminate. Seat memory and comfort features may not function properly until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B00B7 to identify the root cause.
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Quick Info
Category
Body
System
Occupant Safety and Restraint System
Difficulty
Type
Generic (SAE)
Recommended Tools
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