What Does B00E0 Mean?
This code indicates that the Body Control Module (BCM) or Restraint Control Module (RCM) has detected a fault in the deployment control circuit for the secondary seatbelt pretensioner (designated as 'B') on the left side of the third row seating. The subfault designation suggests an internal circuit issue within the pretensioner system, such as abnormal resistance, an open circuit, or a short circuit in the firing squib or wiring. This is a critical safety system component that tensions the seatbelt during a collision to reduce occupant movement.
Safety Warning
The vehicle should NOT be driven until this fault is resolved, as the seatbelt pretensioner will not function properly in a collision, significantly reducing occupant protection. This is a critical safety system failure that requires immediate professional attention.
Common Causes
45%
Faulty or damaged seatbelt pretensioner unit with internal squib circuit failure
30%
Damaged, corroded, or disconnected wiring harness or connector between RCM and pretensioner
15%
Previous deployment or partial deployment of pretensioner not properly reset/replaced
10%
Faulty Restraint Control Module (RCM) with internal driver circuit failure
Diagnostic Steps
1
Step 1: Perform visual inspection of third row left seatbelt pretensioner assembly and harness for physical damage, collision indicators, or deployment evidence (twisted belt, damaged housing). Check for water intrusion or corrosion at connectors.
2
Step 2: With ignition OFF and negative battery terminal disconnected (wait 10+ minutes for capacitor discharge), inspect pretensioner connector for corrosion, bent pins, or loose connection. Clean and secure connections as needed.
3
Step 3: Using a digital multimeter, measure resistance across pretensioner squib terminals (typically 2-5 ohms for most systems). Compare readings to manufacturer specifications. Also check for short to ground or short to power on both circuits.
4
Step 4: If pretensioner resistance is within specification, inspect wiring harness continuity from pretensioner connector back to RCM connector using wiring diagrams. Look for opens, shorts, or high resistance (should be less than 5 ohms total circuit resistance).
5
Step 5: If all wiring and connections test good but pretensioner resistance is out of specification, replace the pretensioner assembly. If wiring is damaged, repair harness and retest.
6
Step 6: After repairs, reconnect battery, clear codes, perform restraint system self-test per manufacturer procedure, and verify code does not return. Test with vehicle stationary and all occupants clear of airbag zones.
Estimated Repair Cost
$400 - $1,200
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) or Restraint Control Module (RCM) has detected a fault in the deployment control circuit for the secondary seatbelt pretensioner (designated as 'B') on the left side of the third row seating. The subfault designation suggests an internal circuit...
The most common cause of B00E0 (Third Row Left Seatbelt Pretensioner "B" Deployment Control (Subfault)) is: Faulty or damaged seatbelt pretensioner unit with internal squib circuit failure
Typical repair costs for B00E0 range from $400 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle should NOT be driven until this fault is resolved, as the seatbelt pretensioner will not function properly in a collision, significantly reducing occupant protection. This is a critical safety system failure that requires immediate professional attention.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B00E0 to identify the root cause.
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Quick Info
Category
Body
System
Supplemental Restraint System (SRS) / Airbag System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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