Engine-Codes.com
Engine-Codes – Generic – U0174

U0174 Code - Lost Communication With Restraints System Sensor 'E'

Quick Answer

The U0174 code indicates that the vehicle's onboard diagnostic system has detected a communication problem with the Restraints System Sensor 'E'. Common causes include Faulty Restraints System Sensor 'E', Wiring issues such as shorts, open circuits, or damaged wiring harnesses, 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
U0174 indicates Lost Communication With Restraints System Sensor 'E'.
Common causes
Common causes include Faulty Restraints System Sensor 'E', Wiring issues such as shorts, open circuits, or damaged wiring harnesses, 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 12, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U0174 Description

The U0174 code indicates that the vehicle's onboard diagnostic system has detected a communication problem with the Restraints System Sensor 'E'. This sensor is responsible for monitoring the vehicle's restraint system, including airbags, seat belt pretensioners, and other safety features. When communication with this sensor is lost, it can lead to potential safety issues as the vehicle's restraint system may not function properly in the event of a collision.

OBDII Code U0174 - Lost Communication With Restraints System Sensor 'E'
U0174 Code - Lost Communication With Restraints System Sensor 'E'

Common Causes of U0174

  1. Faulty Restraints System Sensor 'E'.
  2. Wiring issues such as shorts, open circuits, or damaged wiring harnesses.
  3. Malfunctioning control module responsible for communication with the sensor.
  4. Software glitches or communication errors within the vehicle's network.
  5. Impact or damage to the sensor or its wiring due to a collision or other external factors.

Symptoms of U0174

  1. Airbag warning light illuminated on the dashboard.
  2. Inoperative airbags or seat belt pretensioners.
  3. Erratic behavior of the seat belt warning system.
  4. Loss of communication with other safety-related systems.
  5. Possible deployment of airbags inappropriately or not deploying when needed.

How to Fix U0174

  1. Diagnose the specific cause of the communication loss with the Restraints System Sensor 'E' using a diagnostic scanner.
  2. Inspect the wiring harness and connectors for any visible damage or corrosion.
  3. Test the sensor itself to determine if it is functioning properly or needs replacement.
  4. Check the control module for any faults or errors and address them accordingly.
  5. Clear the diagnostic trouble codes, retest the system, and ensure proper communication with the sensor.

Cost to Fix U0174

The cost of repairing a Lost Communication With Restraints System Sensor 'E' can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair cost for this type of issue can range from $200 to $500, including parts and labor. However, it is advisable to get a detailed estimate from a professional mechanic or repair shop as prices may vary based on the vehicle make and model, the extent of the repair needed, and any additional parts or services required. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often offer more competitive prices.

Need more information about the U0174 code?

Need more information on how to fix the U0174 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0174 code diagnosed by a professional: Find a repair shop in your area

Code U0174 Information for Specific Makes

  • U0174 Chrysler — Lost Communication With Left Side Satellite Acceleration Sensor 3
  • U0174 Dodge — Lost Communication With Left Side Satellite Acceleration Sensor 3
  • U0174 Fiat — Lost Communication With Left Side Satellite Acceleration Sensor 3
  • U0174 Jeep — Lost Communication With Left Side Satellite Acceleration Sensor 3
  • U0174 RAM — Lost Communication With Left Side Satellite Acceleration Sensor 3

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 U0174 Code

No Frequently Asked Questions about U0174 Code found.

Discuss the causes and fixes for U0174 OBDII Code

Submit a New Comment

Code U0174 comments

No comments found for this page.