What Does B0071 Mean?
This code indicates a subfault detected in the deployment control circuit for the first row center seatbelt pretensioner by the restraint control module (RCM/ACM). The control module has identified an abnormality in the electrical circuit or component that would prevent proper deployment of the center seatbelt pretensioner during a collision event. This is a critical safety system malfunction that compromises occupant protection.
Safety Warning
Vehicle is unsafe to drive as the center seatbelt pretensioner will not function during a collision, significantly increasing injury risk for the center seat occupant. Immediate professional repair is required as this is a critical safety system failure.
Common Causes
35%
Faulty seatbelt pretensioner unit or internal resistance out of specification
30%
Damaged or corroded wiring harness or connector between restraint module and pretensioner
20%
Previous deployment or partial deployment without proper system reset and component replacement
10%
Faulty restraint control module (RCM/ACM) with internal circuit malfunction
5%
Improper seat or seatbelt service causing connector damage or pretensioner misalignment
Diagnostic Steps
1
Step 1: Perform visual inspection of center seatbelt pretensioner for signs of previous deployment (torn fabric, extended mechanism) or physical damage. Check deployment indicator if equipped (color-change tab or window).
2
Step 2: Inspect pretensioner electrical connector for corrosion, bent pins, moisture intrusion, or loose connection. Remove connector and check for proper terminal seating and contact integrity.
3
Step 3: Using a digital multimeter, measure resistance across the pretensioner squib terminals (with connector disconnected and ignition off). Compare readings to manufacturer specifications (typically 2-3 ohms). Out-of-range readings indicate faulty pretensioner.
4
Step 4: Check continuity and resistance of wiring harness between restraint control module and pretensioner connector. Inspect for chafing, cuts, or shorts to ground along the entire routing path under the seat.
5
Step 5: Verify proper voltage supply and ground circuits at the restraint control module connector using wiring diagrams. Check for 12V battery voltage and clean ground reference.
6
Step 6: Clear codes and perform restraint system self-test using scan tool functionality. If code immediately returns without physical disturbance, suspect control module. If code does not return, road test and monitor for recurrence after seat movement and vibration.
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
This code indicates a subfault detected in the deployment control circuit for the first row center seatbelt pretensioner by the restraint control module (RCM/ACM). The control module has identified an abnormality in the electrical circuit or component that would prevent proper deployment of the cent...
The most common cause of B0071 (First Row Center Seatbelt Pretensioner Deployment Control (Subfault)) is: Faulty seatbelt pretensioner unit or internal resistance out of specification
Typical repair costs for B0071 range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is unsafe to drive as the center seatbelt pretensioner will not function during a collision, significantly increasing injury risk for the center seat occupant. Immediate professional repair is required as this is a critical safety system failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B0071 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
A quality scan tool helps you read codes, view live data, and clear faults.
