What Does B00BB Mean?
This code indicates that the Body Control Module (BCM) has detected a fault in the driver seat occupant position sensor 'E', which is one of multiple sensors used to determine seat occupancy, position, and weight distribution. The subfault designation suggests an intermittent signal, out-of-range voltage, or communication error from this specific sensor within the seat occupancy detection system. This sensor is typically part of the airbag deployment system, seat belt reminder system, and advanced safety feature calibration.
Common Causes
40%
Faulty or damaged seat position sensor E (pressure mat or position sensor internal failure)
30%
Damaged or corroded wiring harness/connector to sensor E under driver seat
20%
Poor ground connection or broken ground wire in seat sensor circuit
10%
Body Control Module (BCM) software glitch or internal BCM failure
Diagnostic Steps
1
Step 1: Perform visual inspection under driver seat for damaged wiring, loose connectors, or physical damage to seat mat. Check for moisture intrusion, chafing against seat rails, or connector corrosion at sensor E harness connection
2
Step 2: Using a digital multimeter, check voltage supply to sensor E (typically 5V reference) and ground integrity with key on, engine off. Compare readings to manufacturer specifications (usually 4.5-5.5V supply, less than 0.5 ohms ground resistance)
3
Step 3: Monitor live data stream for sensor E output values while applying controlled pressure to different seat positions. Verify sensor responds appropriately with voltage/resistance changes (typical range 0.5-4.5V or 200-4000 ohms depending on design)
4
Step 4: Disconnect sensor E connector and measure resistance across sensor terminals. Compare to specifications (typical range 1-10k ohms at rest). If out of range, replace sensor; if within range, inspect wiring continuity back to BCM
5
Step 5: Clear codes, perform seat calibration procedure if available through advanced scan tool functions, and road test vehicle with varying seat positions and occupant weights to verify repair and ensure code does not return
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected a fault in the driver seat occupant position sensor 'E', which is one of multiple sensors used to determine seat occupancy, position, and weight distribution. The subfault designation suggests an intermittent signal, out-of-range vo...
The most common cause of B00BB (Driver Seat Occupant Position Sensor "E" (Subfault)) is: Faulty or damaged seat position sensor E (pressure mat or position sensor internal failure)
Typical repair costs for B00BB range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is generally safe to drive, but airbag deployment may be compromised or calibrated incorrectly for the driver seat position, potentially resulting in improper airbag function during a collision. Seat belt reminders and other safety features may not function correctly. Repair should be completed within 1-2 weeks to maintain full safety system integrity.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B00BB to identify the root cause.
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Quick Info
Category
Body
System
Occupant Detection and Safety Restraint System
Difficulty
Type
Generic (SAE)
Recommended Tools
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