AutoCodes – Fiat – U0174 Fiat

U0174 Fiat Code - Lost Communication With Left Side Satellite Acceleration Sensor 3

Quick Answer

The impact sensors perform their own self-test using power supplied by the Occupant Restraint Controller (ORC) then communicate this status back to the ORC with periodic updates. Common causes include Faulty Left Side Impact Sensor 3, Left Side Impact Sensor 3 harness is open or shorted, Left Side Impact Sensor 3 circuit poor electrical connection. 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 Fiat indicates Lost Communication With Left Side Satellite Acceleration Sensor 3.
Common causes: Common causes include Faulty Left Side Impact Sensor 3, Left Side Impact Sensor 3 harness is open or shorted, Left Side Impact Sensor 3 circuit poor electrical connection.
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.

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Code Popularity 611

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 03, 2020

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code U0174 Fiat Description

The impact sensors perform their own self-test using power supplied by the Occupant Restraint Controller (ORC) then communicate this status back to the ORC with periodic updates. The repair of this fault condition involves verifying the integrity of the wiring between the ORC and the sensor. This Diagnostic Trouble Code (DTC) sets when the ORC no longer receives the notification of the status update from the side impact sensor. Once set, this DTC is latched for the entire ignition cycle.

OBDII Code U0174 Fiat - Lost Communication With Left Side Satellite Acceleration Sensor 3 - AutoCodes.com — U0174 Fiat Code - Lost Communication With Left Side Satellite Acceleration Sensor 3

What does this mean?

What are the Possible Causes of the DTC U0174 Fiat?

Faulty Left Side Impact Sensor 3
Left Side Impact Sensor 3 harness is open or shorted
Left Side Impact Sensor 3 circuit poor electrical connection
Faulty Occupant Restraint Controller (ORC)

How to Fix the DTC U0174 Fiat?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0174 Fiat code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U0174 Fiat code?

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

Need Help with the Code?

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

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 Fiat Code

1. What are the common symptoms of OBDII code U0174 in a Fiat related to lost communication with the left side satellite acceleration sensor 3?

The common symptoms include the illumination of the check engine light, rough idle, poor fuel efficiency, and possible issues with the vehicle's stability control system.

2. What are the possible causes of OBDII code U0174 in a Fiat indicating lost communication with the left side satellite acceleration sensor 3?

Potential causes may include a faulty sensor, damaged wiring or connectors, a software issue, or a malfunction in the vehicle's electronic control module.

3. How can I diagnose the root cause of OBDII code U0174 in my Fiat for lost communication with the left side satellite acceleration sensor 3?

It is recommended to perform a thorough inspection of the sensor, wiring, and connectors to check for any visible damage. Additionally, using a diagnostic scan tool to retrieve specific error codes can help pinpoint the issue.

4. Can I continue driving my Fiat with OBDII code U0174 related to lost communication with the left side satellite acceleration sensor 3?

It is generally not recommended to continue driving the vehicle with this code present, as it may affect the vehicle's performance and safety systems. It is advised to address the issue promptly.

5. How can I repair OBDII code U0174 in my Fiat for lost communication with the left side satellite acceleration sensor 3?

Repairing this code may involve replacing the faulty sensor, repairing damaged wiring or connectors, updating software, or resetting the electronic control module. It is recommended to consult a qualified mechanic for proper diagnosis and repair.

6. Is it possible to reset OBDII code U0174 in a Fiat without fixing the underlying issue?

While you may be able to clear the code temporarily by resetting the vehicle's computer, the issue causing the code will likely persist and trigger the check engine light again. It is best to address the root cause of the problem.

7. How much does it typically cost to repair OBDII code U0174 in a Fiat related to lost communication with the left side satellite acceleration sensor 3?

The cost of repair can vary depending on the specific cause of the issue, parts needed, and labor rates. It is advisable to obtain a few quotes from reputable automotive repair shops to compare prices.

8. Can extreme weather conditions impact the occurrence of OBDII code U0174 in a Fiat?

Extreme weather conditions, such as excessive heat or moisture, can potentially exacerbate electronic issues in a vehicle, including those related to communication with sensors. It is essential to keep the vehicle well-maintained to minimize the impact of weather-related factors.

9. Are there any preventive measures I can take to avoid OBDII code U0174 in my Fiat?

Regular maintenance, including inspecting and cleaning sensor connectors, ensuring proper wiring integrity, and keeping the vehicle's software up to date, can help prevent issues that may trigger this code.

10. Will fixing OBDII code U0174 improve my Fiat's overall performance and fuel efficiency?

Addressing the underlying issue causing this code can lead to improved performance, smoother operation, and potentially better fuel efficiency by ensuring the vehicle's systems are functioning optimally. It is essential to address the problem promptly for overall vehicle health.