AutoCodes – GMC – U0170 GMC

U0170 GMC Code - Lost Communication With Passenger Presence Detection Sensor Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Passenger Presence Detection Sensor Module, Passenger Presence Detection Sensor Module harness is open or shorted, Passenger Presence Detection Sensor Module 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: U0170 GMC indicates Lost Communication With Passenger Presence Detection Sensor Module.
Common causes: Common causes include Faulty Passenger Presence Detection Sensor Module, Passenger Presence Detection Sensor Module harness is open or shorted, Passenger Presence Detection Sensor Module 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 1,830

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0170 GMC Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Passenger Presence Detection Sensor Module has not been received.

OBDII Code U0170 GMC - Lost Communication With Passenger Presence Detection Sensor Module - AutoCodes.com — U0170 GMC Code - Lost Communication With Passenger Presence Detection Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0170 GMC?

Faulty Passenger Presence Detection Sensor Module
Passenger Presence Detection Sensor Module harness is open or shorted
Passenger Presence Detection Sensor Module circuit poor electrical connection

How to Fix the DTC U0170 GMC?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0170 GMC 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 U0170 GMC code?

Need more information on how to fix the U0170 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0170 GMC 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 U0170 GMC Code

1. What are common symptoms of OBDII code U0170 in a GMC related to the Passenger Presence Detection Sensor Module?

- Common symptoms include the airbag warning light staying on, malfunctioning airbag deployment system, and potential loss of communication with the passenger presence detection sensor module.

2. What are some possible causes of OBDII code U0170 GMC "Lost Communication With Passenger Presence Detection Sensor Module"?

- Possible causes include damaged wiring or connectors, a faulty passenger presence detection sensor module, software issues, or a problem with the airbag control module.

3. How can I diagnose the issue related to OBDII code U0170 GMC?

- Diagnosis typically involves using a scan tool to read the code, checking for other related trouble codes, inspecting the wiring and connectors for damage, and testing the passenger presence detection sensor module.

4. Can I still drive my GMC with the U0170 code present?

- It is not recommended to drive the vehicle with the U0170 code active, as it indicates a potential issue with the airbag system, which could affect safety in the event of a collision.

5. How can I repair the U0170 code in my GMC?

- Repairing the U0170 code may involve fixing any damaged wiring or connectors, replacing the passenger presence detection sensor module if faulty, or reprogramming the airbag control module if necessary.

6. Is it possible to reset the U0170 code in a GMC without fixing the underlying issue?

- While you can clear the code using a scan tool, it is important to address the root cause of the problem to ensure the airbag system functions properly and safely.

7. Will the U0170 code cause my airbags to not deploy in an accident?

- The U0170 code indicates a communication issue rather than a direct problem with airbag deployment. However, it is crucial to address the code to ensure the airbag system functions correctly during an accident.

8. How much does it typically cost to repair the U0170 code in a GMC?

- The cost of repairing the U0170 code can vary depending on the specific cause of the issue, but it may involve a few hundred dollars for parts and labor.

9. Can I fix the U0170 code in my GMC myself, or do I need a professional mechanic?

- Depending on your skill level and access to tools, you may be able to address the U0170 code yourself by checking wiring and connectors. However, complex repairs or component replacements may require a professional mechanic.

10. How can I prevent the U0170 code from reoccurring in my GMC in the future?

- To prevent the U0170 code from reoccurring, it is essential to perform regular maintenance checks on the airbag system, ensure all wiring and connectors are in good condition, and address any related issues promptly.