What Does B007A Mean?
This code indicates a fault within the passenger-side seatbelt pretensioner 'B' deployment control circuit or system. The Body Control Module (BCM) or Restraint Control Module (RCM) has detected a subfault in the electrical circuit, wiring, or component that controls the secondary passenger pretensioner deployment mechanism. This subfault means there is an issue preventing proper pretensioner function during a collision event, compromising passenger safety restraint effectiveness.
Safety Warning
This is a critical safety issue as the passenger seatbelt pretensioner may not deploy properly in a collision, significantly increasing injury risk. Vehicle should not be driven with passengers until repaired, and the airbag warning light will remain illuminated indicating system malfunction.
Common Causes
35%
Faulty seatbelt pretensioner assembly or internal resistance out of specification
30%
Damaged or corroded wiring harness between RCM/BCM and pretensioner connector
20%
Corroded or loose electrical connector at pretensioner or control module
10%
Faulty Restraint Control Module (RCM) or Body Control Module deployment driver circuit
5%
Previous airbag deployment not properly reset or replaced components
Diagnostic Steps
1
Step 1: Perform visual inspection of passenger seatbelt pretensioner B assembly and wiring harness for physical damage, corrosion, or previous collision damage. Check for proper connector seating and pin condition.
2
Step 2: Using a digital multimeter, measure resistance across the pretensioner squib terminals (connector disconnected, ignition off). Typical specification is 2-3 ohms; consult manufacturer data for exact values. Out-of-range readings indicate faulty pretensioner.
3
Step 3: Inspect and test wiring harness continuity between the pretensioner connector and the RCM/BCM connector. Check for opens, shorts to ground, or shorts to power using multimeter with all connectors disconnected and battery isolated.
4
Step 4: Inspect the Restraint Control Module connector for corrosion, damaged pins, or moisture intrusion. Check ground connections associated with the restraint system for proper continuity and low resistance (less than 1 ohm).
5
Step 5: If all wiring and pretensioner resistance values are within specification, suspect faulty RCM/BCM internal driver circuit. Replace pretensioner if resistance is out of spec, or replace module if wiring tests pass.
6
Step 6: After repairs, clear codes and perform system self-test using scan tool. Verify proper system operation and ensure no codes return. Confirm airbag/seatbelt warning light extinguishes after key cycle.
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
This code indicates a fault within the passenger-side seatbelt pretensioner 'B' deployment control circuit or system. The Body Control Module (BCM) or Restraint Control Module (RCM) has detected a subfault in the electrical circuit, wiring, or component that controls the secondary passenger pretensi...
The most common cause of B007A (Passenger Seatbelt Pretensioner "B" Deployment Control (Subfault)) is: Faulty seatbelt pretensioner assembly or internal resistance out of specification
Typical repair costs for B007A range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a critical safety issue as the passenger seatbelt pretensioner may not deploy properly in a collision, significantly increasing injury risk. Vehicle should not be driven with passengers until repaired, and the airbag warning light will remain illuminated indicating system malfunction.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B007A 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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