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Engine-Codes – Generic – U017C

U017C Code - Lost Communication With Restraints System Sensor 'M'

Quick Answer

The diagnostic trouble code U017C indicates that the vehicle's onboard computer has lost communication with the Restraints System Sensor 'M'. Common causes include Faulty Restraints System Sensor 'M', Wiring harness issues, such as loose connections or damaged wires, Malfunctioning control module responsible for communication with the sensor. 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
U017C indicates Lost Communication With Restraints System Sensor 'M'.
Common causes
Common causes include Faulty Restraints System Sensor 'M', Wiring harness issues, such as loose connections or damaged wires, Malfunctioning control module responsible for communication with the sensor.
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 15, 2024
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Code U017C Description

The diagnostic trouble code U017C indicates that the vehicle's onboard computer has lost communication with the Restraints System Sensor 'M'. The Restraints System Sensor 'M' is a component of the vehicle's safety system that is responsible for monitoring and detecting impacts or collisions. When communication with this sensor is lost, it can have serious implications for the vehicle's safety systems.

OBDII Code U017C - Lost Communication With Restraints System Sensor 'M'
U017C Code - Lost Communication With Restraints System Sensor 'M'

Common Causes of U017C

  1. Faulty Restraints System Sensor 'M'.
  2. Wiring harness issues, such as loose connections or damaged wires.
  3. Malfunctioning control module responsible for communication with the sensor.
  4. Communication bus errors within the vehicle's network.
  5. Water damage or corrosion affecting the sensor or wiring.

Symptoms of U017C

  1. Airbag warning light illuminated on the dashboard.
  2. Inability to activate or deactivate the passenger airbag.
  3. Seatbelt warning light stays on.
  4. Loss of communication with other safety systems in the vehicle.

How to Fix U017C

  1. Perform a comprehensive diagnostic scan to retrieve the U017C code and identify the specific cause of the communication loss.
  2. Inspect the wiring harness connected to the Restraints System Sensor 'M' for any visible damage or loose connections. Repair or replace as necessary.
  3. Test the sensor itself for proper functionality and replace if found to be faulty.
  4. Check the control module for any faults or errors and address them accordingly.
  5. Clear the diagnostic trouble codes from the vehicle's computer and perform a test drive to ensure that the communication with the sensor has been restored.

Cost to Fix U017C

The typical repair costs for addressing the U017C code can vary depending on the specific cause of the communication loss. In general, the cost of parts such as a new sensor or control module, along with labor charges for diagnosis and repair, can range from $200 to $600. However, it is important to note that actual costs may differ based on factors such as location, vehicle make and model, and the rates of the auto repair shop. It is advisable to contact local repair shops for a more accurate estimate. Keep in mind that diagnostic time and labor rates can range from $80 to $150 per hour.

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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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