B0071 Code - Passenger Seat Belt Tension Sensor Circuit
Quick Answer
The B0071 diagnostic trouble code (DTC) indicates an issue with the passenger seat belt tension sensor circuit. Common causes include Faulty seat belt tension sensor, Wiring issues such as frayed or damaged wires, Loose or corroded electrical connections. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B0071 indicates Passenger Seat Belt Tension Sensor Circuit.
- Common causes
- Common causes include Faulty seat belt tension sensor, Wiring issues such as frayed or damaged wires, Loose or corroded electrical connections.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code B0071 Description
The B0071 diagnostic trouble code (DTC) indicates an issue with the passenger seat belt tension sensor circuit. This sensor is responsible for detecting the tension in the seat belt and sending signals to the vehicle's airbag control module. When this circuit malfunctions, it can affect the proper deployment of the airbags in the event of a collision. This can compromise the safety of the vehicle occupants as the airbags may not deploy as intended.
Common Causes of B0071
- Faulty seat belt tension sensor.
- Wiring issues such as frayed or damaged wires.
- Loose or corroded electrical connections.
- Issues with the airbag control module.
- Vehicle collision or impact that damages the sensor or wiring.
Symptoms of B0071
- Airbag warning light illuminated on the dashboard.
- Warning message or chime indicating a seat belt issue.
- Inaccurate or erratic readings from the passenger seat belt sensor.
- Airbags may not deploy in a collision.
- Vehicle may fail inspection due to safety concerns.
How to Fix B0071
- Begin by diagnosing the specific cause of the code using a diagnostic scan tool.
- Inspect the seat belt tension sensor and wiring for any visible damage or issues.
- Repair or replace any damaged wiring or connections.
- Test the sensor and circuit to ensure proper functioning.
- Clear the DTC from the vehicle's system and test to verify that the issue has been resolved.
Cost to Fix B0071
The cost of repairing a passenger seat belt tension sensor circuit issue can vary depending on the extent of the damage and the specific components that need to be repaired or replaced. In general, the parts for this repair can range from $100 to $300, with labor costs adding another $100 to $200. Keep in mind that additional diagnostic time may be required to pinpoint the exact cause of the issue, which can impact the overall repair cost. It's recommended to consult with a professional mechanic or auto repair shop for a more accurate cost estimate based on your vehicle's make and model.
Tech Notes for B0071
B0071:04 Passenger Seat Belt Tension Sensor Circuit Open
B0071:07 Passenger Seat Belt Tension Sensor Circuit Voltage Above Threshold
B0071:08 Passenger Seat Belt Tension Sensor Circuit Voltage Performance Signal Invalid
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Code B0071 Information for Specific Makes
- B0071 Buick — Passenger Seat Belt Tension Sensor Circuit
- B0071 Cadillac — Passenger Seat Belt Tension Sensor Circuit
- B0071 Chevrolet — Passenger Seat Belt Tension Sensor Circuit
- B0071 GMC — Passenger Seat Belt Tension Sensor Circuit
- B0071 Hummer — Passenger Seat Belt Tension Sensor Circuit
- B0071 Pontiac — Passenger Seat Belt Tension Sensor Circuit
- B0071 Saturn — Passenger Seat Belt Tension Sensor Circuit
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about B0071 Code
1. What does OBDII code B0071 mean?
Code B0071 indicates an issue with the passenger seat belt tension sensor circuit, which monitors the tension in the seat belt to ensure proper airbag deployment during an accident.
2. What are the common symptoms of code B0071?
Symptoms include the airbag warning light illuminating, malfunctioning passenger airbag system, and potential seat belt warning chimes.
3. What causes code B0071 to appear?
Common causes include a damaged or faulty seat belt tension sensor, loose or corroded wiring and connectors, or a malfunctioning airbag control module.
4. Can I still drive my vehicle with code B0071?
Yes, but it is not recommended, as this code may indicate issues with the airbag system, potentially compromising passenger safety in an accident.
5. How do I diagnose code B0071?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the seat belt tension sensor and wiring for damage, and testing the sensor circuit with a multimeter.
6. How can I fix code B0071?
Repairs may include replacing the seat belt tension sensor, repairing or replacing damaged wiring and connectors, or reprogramming the airbag control module.
7. How much does it cost to fix code B0071?
The cost can range from $100 to $500 depending on whether only wiring repairs are needed or if the seat belt tension sensor must be replaced.
8. Can a loose connector cause code B0071?
Yes, loose or improperly connected wiring can interrupt the circuit and trigger this code.
9. Does code B0071 trigger airbag system failure?
Yes, if the seat belt tension sensor is not functioning correctly, the airbag system may not deploy as intended during a collision.
10. Can I clear code B0071 without fixing the issue?
Clearing the code without addressing the underlying problem will only result in the code reappearing and does not resolve the safety risk.
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