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Engine-Codes – Generic – U0471

U0471 Code - Invalid Data Received From Restraints System Sensor 'A'

Quick Answer

The diagnostic trouble code U0471 indicates that the vehicle's onboard computer has detected invalid data being received from the restraints system sensor 'A'. Common causes include Faulty restraints system sensor 'A', Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting the sensor's operation. 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
U0471 indicates Invalid Data Received From Restraints System Sensor 'A'.
Common causes
Common causes include Faulty restraints system sensor 'A', Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting the sensor's operation.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code U0471 Description

The diagnostic trouble code U0471 indicates that the vehicle's onboard computer has detected invalid data being received from the restraints system sensor 'A'. This sensor is responsible for monitoring various aspects of the vehicle's safety systems, including airbags, seat belts, and other restraint systems. When the sensor sends incorrect or inconsistent data to the vehicle's computer, it can lead to issues with the proper operation of these safety systems.

OBDII Code U0471 - Invalid Data Received From Restraints System Sensor 'A'
U0471 Code - Invalid Data Received From Restraints System Sensor 'A'

Common Causes of U0471

  1. Faulty restraints system sensor 'A'
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or debris affecting the sensor's operation
  4. Issues with the vehicle's onboard computer receiving the sensor data

Symptoms of U0471

  1. Airbag warning light illuminated on the dashboard
  2. Seat belt warning light flashing or staying on
  3. Inconsistent airbag deployment or seat belt locking
  4. Unusual clicking or buzzing sounds from the restraints system area

How to Fix U0471

  1. Begin by using a diagnostic scanner to retrieve the specific fault codes and identify the exact cause of the issue.
  2. Inspect the wiring and connectors in the restraints system sensor 'A' circuit for any damage or corrosion, repairing or replacing as needed.
  3. Test the sensor itself to determine if it is functioning correctly, replacing it if necessary.
  4. Clear the fault codes from the vehicle's computer and test the restraints system to ensure that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to pinpoint the exact cause of the issue.

Cost to Fix U0471

The typical repair costs for addressing the U0471 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, repairing a faulty restraints system sensor 'A' and addressing related wiring or connector issues can range from $200 to $500, including parts and labor. However, it's essential to note that the actual costs may differ based on the location, vehicle make and model, and the hourly labor rates charged by the auto repair shop. It is recommended to obtain quotes from multiple shops to get a more accurate estimate of the repair costs.

Need more information about the U0471 code?

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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.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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