B0071:04 Code - Passenger Seat Belt Tension Sensor Circuit Open
Quick Answer
The B0071:04 code indicates that there is an issue with the passenger seat belt tension sensor circuit being open. Common causes include Faulty seat belt tension sensor, Damage to the wiring harness connected to the sensor, Corrosion or loose connections in the sensor circuit. 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
- B0071:04 indicates Passenger Seat Belt Tension Sensor Circuit Open.
- Common causes
- Common causes include Faulty seat belt tension sensor, Damage to the wiring harness connected to the sensor, Corrosion or loose connections in the sensor circuit.
- 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 B0071:04 Description
The B0071:04 code indicates that there is an issue with the passenger seat belt tension sensor circuit being open. This sensor is responsible for detecting if the passenger seat belt is buckled and if the tension is correct. When this circuit is open, it means that the sensor is not sending the proper signal to the vehicle's computer system. This can lead to the airbag system not functioning properly in the event of a collision, as it may not deploy or deploy incorrectly. It is crucial to address this issue promptly to ensure the safety of passengers in the vehicle.
Common Causes of B0071:04
- Faulty seat belt tension sensor.
- Damage to the wiring harness connected to the sensor.
- Corrosion or loose connections in the sensor circuit.
- Issues with the airbag control module.
- Previous collision or impact causing damage to the sensor or wiring.
Symptoms of B0071:04
- Airbag warning light illuminated on the dashboard.
- Passenger airbag indicator showing as off when a passenger is seated.
- Inability to activate the passenger side airbag.
- Audible warning chime indicating a problem with the seat belt system.
- Vehicle may fail state inspection due to safety concerns.
How to Fix B0071:04
- Begin by diagnosing the specific cause of the open circuit, using a scanner to retrieve the fault codes.
- Inspect the wiring harness for any visible damage or corrosion, repairing or replacing as needed.
- Test the seat belt tension sensor for proper functionality, replacing if found to be faulty.
- Clear the fault codes and reset the airbag system to ensure the issue has been resolved.
- Conduct a thorough test drive to verify that the passenger seat belt tension sensor circuit is now functioning correctly.
Cost to Fix B0071:04
The cost of repairing a passenger seat belt tension sensor circuit open issue can vary depending on the specific cause of the problem and the vehicle make and model. On average, you can expect to pay between $150 to $400 for parts and labor. Keep in mind that labor rates at auto repair shops may range from $80 to $150 per hour, so it's advisable to check with local shops for an accurate estimate. Additionally, if the issue requires replacing the seat belt tension sensor or the airbag control module, the cost may be higher.
Tech Notes for B0071:04
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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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 B0071:04 Code
1. What are the common symptoms of OBDII code B0071:04 (Passenger Seat Belt Tension Sensor Circuit Open)?
- Common symptoms include the airbag warning light illuminating on the dashboard, the passenger airbag being disabled, and possible chimes or messages indicating a seat belt issue.
2. What are the possible causes of OBDII code B0071:04?
- The code may be triggered by a faulty passenger seat belt tension sensor, damaged wiring or connectors in the circuit, or a malfunctioning airbag control module.
3. How serious is OBDII code B0071:04?
- This code indicates a problem with the passenger seat belt tension sensor circuit, which can affect the proper functioning of the passenger airbag system. It is important to address this issue promptly for safety reasons.
4. Can I continue driving with OBDII code B0071:04 present?
- While the vehicle may still be operational, it is not recommended to continue driving with this code active, as it may compromise the effectiveness of the passenger airbag system in the event of a collision.
5. How can I diagnose and repair OBDII code B0071:04?
- Diagnosis typically involves inspecting the seat belt tension sensor, checking wiring and connectors for damage, and testing the airbag control module. Repair may involve replacing the sensor, repairing wiring, or resetting the system.
6. Can I reset OBDII code B0071:04 myself?
- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the fault. It is recommended to diagnose and repair the problem to ensure proper functioning of the airbag system.
7. Will OBDII code B0071:04 cause the airbags not to deploy in a crash?
- If left unresolved, this code may affect the passenger airbag system's ability to deploy in a crash, as it is related to the seat belt tension sensor circuit responsible for determining airbag deployment.
8. How much does it cost to fix OBDII code B0071:04?
- The cost of repairs for this code can vary depending on the specific issue causing the fault. It is advisable to consult a professional technician for an accurate diagnosis and cost estimate.
9. Is OBDII code B0071:04 a common issue in certain vehicle makes or models?
- This code can occur in various vehicle makes and models equipped with passenger seat belt tension sensors and airbag systems. It is recommended to address the issue promptly regardless of the vehicle type.
10. Can a DIY enthusiast repair OBDII code B0071:04 at home?
- While some basic troubleshooting steps can be done at home, diagnosing and repairing OBDII code B0071:04 may require specialized tools and expertise. It is advisable to seek assistance from a qualified mechanic for proper diagnosis and repair.
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