B0071:03 Code - Passenger Seat Belt Tension Sensor Circuit Voltage Below Threshold
Quick Answer
The B0071:03 diagnostic trouble code (DTC) indicates that there is an issue with the passenger seat belt tension sensor circuit, specifically that the voltage is below the threshold expected by the vehicle's computer system. Common causes include Faulty passenger seat belt tension sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or water damage 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
- B0071:03 indicates Passenger Seat Belt Tension Sensor Circuit Voltage Below Threshold.
- Common causes
- Common causes include Faulty passenger seat belt tension sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or water damage 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 B0071:03 Description
The B0071:03 diagnostic trouble code (DTC) indicates that there is an issue with the passenger seat belt tension sensor circuit, specifically that the voltage is below the threshold expected by the vehicle's computer system. This sensor is responsible for detecting when the passenger seat belt is buckled and tensioned properly. When the voltage is below the expected level, it can indicate a malfunction in the sensor or its circuitry, potentially compromising the safety systems of the vehicle.
Common Causes of B0071:03
- Faulty passenger seat belt tension sensor
- Damaged wiring or connectors in the sensor circuit
- Corrosion or water damage in the sensor circuit
- Issues with the vehicle's computer system interpreting sensor data
- Previous collision or impact damaging the sensor or circuit
Symptoms of B0071:03
- Airbag warning light illuminated on the dashboard
- Passenger airbag not deploying in a collision
- Inconsistent or erratic behavior of the airbag system
- Fault codes related to the seat belt tension sensor circuit stored in the vehicle's computer
- Vehicle failing state inspection due to airbag system issues
How to Fix B0071:03
- Begin by diagnosing the specific cause of the issue using a scan tool to read the DTC and pinpoint the fault.
- Inspect the wiring and connectors in the seat belt tension sensor circuit for any damage, corrosion, or loose connections.
- Test the passenger seat belt tension sensor for proper functionality and replace if necessary.
- Clear the DTC from the vehicle's computer system and test the airbag system to ensure proper operation.
- If the issue persists, further diagnosis may be needed to identify any underlying problems with the vehicle's computer system or other components.
Cost to Fix B0071:03
The cost of repairing a passenger seat belt tension sensor circuit voltage issue can vary depending on the specific cause of the problem and the make and model of the vehicle. On average, you can expect to pay anywhere from $150 to $500 for parts and labor. Keep in mind that labor rates at auto repair shops can range from $80 to $150 per hour, so it's advisable to get a quote from a trusted mechanic to determine the exact cost for your vehicle. Additional diagnostic time may also be needed to pinpoint the exact cause of the issue, which could incur extra charges.
Tech Notes for B0071:03
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.
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