B0071:08 Code - Passenger Seat Belt Tension Sensor Circuit Voltage Performance Signal Invalid
Quick Answer
The B0071:08 diagnostic trouble code (DTC) indicates an issue with the passenger seat belt tension sensor circuit voltage performance signal. Common causes include Damaged wiring or connectors in the seat belt tension sensor circuit, Faulty passenger seat belt tension sensor, ECM software glitches or malfunctions. 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
- B0071:08 indicates Passenger Seat Belt Tension Sensor Circuit Voltage Performance Signal Invalid.
- Common causes
- Common causes include Damaged wiring or connectors in the seat belt tension sensor circuit, Faulty passenger seat belt tension sensor, ECM software glitches or malfunctions.
- 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 B0071:08 Description
The B0071:08 diagnostic trouble code (DTC) indicates an issue with the passenger seat belt tension sensor circuit voltage performance signal. This sensor is responsible for detecting the tension in the seat belt and sending signals to the vehicle's airbag system to ensure proper deployment in the event of a collision. When the voltage performance signal is deemed invalid, it means that the sensor is not functioning correctly, which can compromise the safety systems of the vehicle.
Common Causes of B0071:08
- Damaged wiring or connectors in the seat belt tension sensor circuit.
- Faulty passenger seat belt tension sensor.
- ECM software glitches or malfunctions.
- Corrosion or debris affecting sensor performance.
- Impact damage to the passenger seat area.
Symptoms of B0071:08
- Airbag warning light illuminated on the dashboard.
- Passenger airbag status light indicating a fault.
- Inconsistent or erratic seat belt tension warnings.
- Inability to properly buckle the passenger seat belt.
- Potential failure of the passenger airbag to deploy in a collision.
How to Fix B0071:08
- Begin by conducting a thorough visual inspection of the seat belt tension sensor circuit, looking for any visible damage or loose connections.
- Use a multimeter to test the voltage output of the sensor and compare it to manufacturer specifications.
- If the sensor is faulty, replace it with a new OEM part and ensure proper calibration.
- Check and repair any damaged wiring or connectors in the circuit.
- Clear the DTC from the vehicle's ECM using a diagnostic scan tool and perform a test drive to verify that the issue has been resolved.
Cost to Fix B0071:08
The typical repair costs for addressing a B0071:08 code can vary depending on the specific vehicle make and model, as well as the extent of the issue. In general, replacing a passenger seat belt tension sensor and addressing related wiring or connector issues can range from $200 to $500, including parts and labor. It's important to consider additional diagnostic time and labor rates, which can vary between auto repair shops. It's advisable to consult with a professional technician for a more accurate cost estimate based on your vehicle's specific needs.
Tech Notes for B0071:08
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 B0071:08 Code
What does the OBDII code B0071:08 mean?
Code B0071:08 indicates an issue with the passenger seat belt tension sensor circuit, specifically that the voltage performance signal is invalid or outside the expected range.
What are the symptoms of code B0071:08?
Common symptoms include the airbag warning light being illuminated, potential deactivation of the passenger airbag, or a seat belt warning chime that doesn’t turn off.
What causes the B0071:08 code to appear?
Causes can include a faulty seat belt tension sensor, damaged or corroded wiring, a loose or disconnected connector, or a malfunctioning airbag control module.
Can I drive my car with the B0071:08 code active?
While the vehicle may still be drivable, it’s not recommended because the airbag system may not function correctly in an accident, posing a safety risk.
How is the B0071:08 code diagnosed?
A technician will use a scan tool to verify the code, inspect the seat belt tension sensor and wiring for damage, and test the circuit voltage to identify abnormalities.
How do you fix the B0071:08 code?
Repairs may involve replacing the seat belt tension sensor, repairing damaged wiring or connectors, or reprogramming or replacing the airbag control module if necessary.
Can a dead battery trigger the B0071:08 code?
Yes, a weak or dead battery can cause voltage irregularities, potentially triggering this code.
Does the B0071:08 code affect the airbag system?
Yes, this code may disable the passenger airbag or cause it to function improperly, which is why addressing it promptly is crucial for safety.
Is the B0071:08 code covered under warranty?
This depends on the vehicle’s warranty terms, but if the issue is related to a factory defect, it may be covered under a warranty for safety systems.
Can I reset the B0071:08 code without repairs?
Clearing the code with a scan tool might temporarily turn off the warning light, but without fixing the underlying issue, the code is likely to return.
Discuss the causes and fixes for B0071:08 OBDII Code
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