Engine-CodesGeneric – U0170

U0170 Code - Lost Communication With Restraints System Sensor 'A'

Quick Answer

The U0170 code indicates that there has been a communication failure with the Restraints System Sensor 'A' in the vehicle. Common causes include Faulty Restraints System Sensor 'A', Wiring issues, such as a short circuit or open circuit, Loose or corroded connections in the sensor 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
U0170 indicates Lost Communication With Restraints System Sensor 'A'.
Common causes
Common causes include Faulty Restraints System Sensor 'A', Wiring issues, such as a short circuit or open circuit, Loose or corroded connections in the sensor 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.
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code U0170 Description

The U0170 code indicates that there has been a communication failure with the Restraints System Sensor 'A' in the vehicle. The Restraints System Sensor 'A' is responsible for monitoring and controlling various safety systems within the vehicle, such as airbags, seatbelt pretensioners, and other restraint devices. When communication is lost with this sensor, it can lead to a number of safety-related issues and potentially compromise the effectiveness of these systems in the event of a collision.

OBDII Code U0170 - Lost Communication With Restraints System Sensor 'A'
U0170 Code - Lost Communication With Restraints System Sensor 'A'

Common Causes of U0170

  1. Faulty Restraints System Sensor 'A'.
  2. Wiring issues, such as a short circuit or open circuit.
  3. Loose or corroded connections in the sensor system.
  4. Malfunctioning control module.
  5. Water or moisture damage affecting the sensor.

Symptoms of U0170

  1. Airbag warning light illuminated on the dashboard.
  2. Inability to activate or deactivate the passenger airbag.
  3. Seatbelt warning light or chime constantly on.
  4. Inconsistent performance of safety systems during a collision.
  5. Loss of communication with other modules in the vehicle.

How to Fix U0170

  1. Use a diagnostic scanner to retrieve the fault code and pinpoint the exact cause of the communication failure.
  2. Inspect the wiring and connections related to the Restraints System Sensor 'A' for any signs of damage or corrosion.
  3. Test the sensor itself to determine if it is functioning properly or needs to be replaced.
  4. Check the control module for any faults or malfunctions and replace if necessary.
  5. Clear the fault code from the vehicle's memory and perform a test drive to ensure that the issue has been resolved.

Cost to Fix U0170

The cost of repairing a U0170 code can vary depending on the specific cause of the communication failure and the extent of the repairs needed. On average, the repair cost for this issue can range from $100 to $500, including parts and labor. However, it is important to note that labor rates and diagnostic fees at auto repair shops can fluctuate based on location, vehicle make and model, and other factors. It is recommended to obtain quotes from multiple reputable repair shops to get a more accurate estimate for the repair.

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Code U0170 Information for Specific Makes

  • U0170 Buick — Lost Communication With Passenger Presence Detection Sensor Module
  • U0170 Cadillac — Lost Communication With Passenger Presence Detection Sensor Module
  • U0170 Chevrolet — Lost Communication With Passenger Presence Detection Sensor Module
  • U0170 Chrysler — Lost Communication With Up-Front Left Satellite Acceleration Sensor
  • U0170 Dodge — Lost Communication With Up-Front Left Satellite Acceleration Sensor
  • U0170 Fiat — Lost Communication With Up-Front Left Satellite Acceleration Sensor
  • U0170 GMC — Lost Communication With Passenger Presence Detection Sensor Module
  • U0170 Jeep — Lost Communication With Up-Front Left Satellite Acceleration Sensor
  • U0170 RAM — Lost Communication With Up-Front Left Satellite Acceleration Sensor

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.

Frequently Asked Questions about U0170 Code

No Frequently Asked Questions about U0170 Code found.

Discuss the causes and fixes for U0170 OBDII Code

  • 2008 Jeep Liberty
    Lost communication w/up front
    Left Satelite Acceleration Sensor Code U0170
    Wouldn't that be the sensor on the accelerator peddle ?