AutoCodes – Pontiac – U0104 Pontiac

U0104 Pontiac Code - Lost Communication With Distance Sensing and Cruise Control 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 Distance Sensing and Cruise Control (DSCC) Module, DSCC Module harness is open or shorted, DSCC 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: U0104 Pontiac indicates Lost Communication With Distance Sensing and Cruise Control Module.
Common causes: Common causes include Faulty Distance Sensing and Cruise Control (DSCC) Module, DSCC Module harness is open or shorted, DSCC 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 3,176

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 Mar 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0104 Pontiac 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.

OBDII Code U0104 Pontiac - Lost Communication With Distance Sensing and Cruise Control Module - AutoCodes.com — U0104 Pontiac Code - Lost Communication With Distance Sensing and Cruise Control Module

What does this mean?

What are the Possible Causes of the DTC U0104 Pontiac?

Faulty Distance Sensing and Cruise Control (DSCC) Module
DSCC Module harness is open or shorted
DSCC Module circuit poor electrical connection

How to Fix the DTC U0104 Pontiac?

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 U0104 Pontiac 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.

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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 U0104 Pontiac Code

1. What does the OBDII code U0104 mean on a Pontiac?

U0104 indicates a loss of communication between the vehicleâ€™s main control module and the Distance Sensing and Cruise Control Module (DCSCM).

2. What are common symptoms of the U0104 code?

Symptoms include the cruise control not functioning, warning lights on the dashboard (like the check engine light), and possible reduced driver-assist features.

3. What causes the U0104 code to appear?

The code can be triggered by a faulty Distance Sensing and Cruise Control Module, damaged wiring, poor electrical connections, or issues with the CAN (Controller Area Network) bus communication.

4. Can I drive my Pontiac with the U0104 code?

While the vehicle may remain drivable, features like cruise control and distance sensing may be disabled, potentially reducing safety and convenience.

5. How do I diagnose the U0104 code?

Start by inspecting the wiring and connections to the Distance Sensing and Cruise Control Module. Use an advanced scan tool to check for communication errors on the CAN bus network.

6. What should I check first to fix the U0104 code?

Begin by inspecting the wiring harness and connections to the Distance Sensing and Cruise Control Module for damage, corrosion, or loose connections.

7. Does a faulty module always cause the U0104 code?

Not always. Other issues, such as a CAN bus network problem or a blown fuse, can also cause the loss of communication.

8. How much does it cost to repair the U0104 code?

Repair costs vary depending on the cause but can range from $100 for simple wiring repairs to $1,000 or more if the module itself needs replacement.

9. Can a software update fix the U0104 code?

In some cases, a software update for the vehicleâ€™s control modules may resolve communication issues if they are caused by outdated programming.

10. Do I need a professional to fix the U0104 code?

While basic checks like inspecting wiring can be done at home, diagnosing and fixing advanced CAN bus or module issues typically require specialized tools and expertise.