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Engine-Codes – Generic – U0472

U0472 Code - Invalid Data Received From Restraints System Sensor 'B'

Quick Answer

The U0472 code indicates that the vehicle's onboard computer has detected invalid data being received from the Restraints System Sensor 'B'. Common causes include Faulty Restraints System Sensor 'B', Damaged wiring or connectors in the sensor circuit, Software glitch in the vehicle's computer system. 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
U0472 indicates Invalid Data Received From Restraints System Sensor 'B'.
Common causes
Common causes include Faulty Restraints System Sensor 'B', Damaged wiring or connectors in the sensor circuit, Software glitch in the vehicle's computer system.
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 U0472 Description

The U0472 code indicates that the vehicle's onboard computer has detected invalid data being received from the Restraints System Sensor 'B'. This sensor is responsible for monitoring various aspects of the vehicle's restraint system, including airbags and seatbelt pretensioners. When the sensor detects an issue, it sends signals to the vehicle's computer system to trigger warning lights on the dashboard and potentially affect the performance of the restraint system.

OBDII Code U0472 - Invalid Data Received From Restraints System Sensor 'B'
U0472 Code - Invalid Data Received From Restraints System Sensor 'B'

Common Causes of U0472

  1. Faulty Restraints System Sensor 'B'
  2. Damaged wiring or connectors in the sensor circuit
  3. Software glitch in the vehicle's computer system
  4. Communication error between modules in the vehicle's network

Symptoms of U0472

  1. Illumination of the airbag warning light on the dashboard
  2. Inability to reset the airbag warning light after clearing the code
  3. Inconsistent deployment of the airbags in a collision
  4. Failure of the seatbelt pretensioners to engage during sudden braking

How to Fix U0472

  1. Begin by conducting a visual inspection of the wiring and connectors associated with the Restraints System Sensor 'B'. Look for any signs of damage, corrosion, or loose connections. Repair or replace any damaged components as needed.
  2. Use a diagnostic scanner to reset the code and clear the vehicle's computer memory. Monitor the system for any reoccurrence of the code after resetting.
  3. If the code persists, test the Restraints System Sensor 'B' using a multimeter to check for proper voltage and continuity. Replace the sensor if it fails the test.
  4. Check the vehicle's computer system for any software updates or glitches that may be causing the issue. Update the software or perform a system reset if necessary.
  5. If the problem still persists, consult a professional mechanic or dealership for further diagnosis and potential replacement of the vehicle's computer system.

Cost to Fix U0472

The typical repair costs for addressing the U0472 code can vary depending on the specific cause of the issue. In general, the cost of replacing a Restraints System Sensor 'B' can range from $100 to $300, including parts and labor. However, if the issue is related to wiring or computer system problems, the costs may increase significantly. Additionally, the diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local providers for a more precise estimate.

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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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