AutoCodes – Generic – U0147

U0147 Code - Lost Communication With Gateway Module 'B'

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Gateway Module 'B', Gateway Module 'B' harness is open or shorted, Gateway Module 'B' 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: U0147 indicates Lost Communication With Gateway Module 'B'.
Common causes: Common causes include Faulty Gateway Module 'B', Gateway Module 'B' harness is open or shorted, Gateway Module 'B' 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 18,802

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 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0147 Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Gateway Module 'B' has not been received.

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OBDII Code U0147 - Lost Communication With Gateway Module 'B' - AutoCodes.com — U0147 Code - Lost Communication With Gateway Module 'B'

What does this mean?

What are the Possible Causes of the DTC U0147?

Faulty Gateway Module 'B'
Gateway Module 'B' harness is open or shorted
Gateway Module 'B' circuit poor electrical connection

How to Fix the DTC U0147?

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 U0147 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 U0147 code?

Need more information on how to fix the U0147 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0147 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0147 Chrysler — Lost Communication With Telematics Gateway Module
U0147 Dodge — Lost Communication With Telematics Gateway Module
U0147 Fiat — Lost Communication With Telematics Gateway Module
U0147 Jeep — Lost Communication With Telematics Gateway Module
U0147 RAM — Lost Communication With Telematics Gateway Module

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 U0147 Code

1. What are common symptoms of OBDII code U0147?

- Common symptoms include the illumination of the check engine light, difficulty starting the vehicle, and issues with various electronic systems.

2. What does the U0147 code indicate?

- The U0147 code indicates that the vehicle's onboard computer has lost communication with the Gateway Module 'B', which serves as a communication link between different control modules.

3. What are some possible causes of the U0147 code?

- Possible causes include a faulty Gateway Module 'B', damaged wiring or connectors in the communication network, low battery voltage, or a software glitch in the vehicle's control modules.

4. How can I diagnose the U0147 code?

- Diagnosing the U0147 code typically involves using a professional OBDII scanner to retrieve the code, checking for other related codes, inspecting the communication network for faults, and testing the Gateway Module 'B' for proper function.

5. Can I still drive my vehicle with the U0147 code present?

- It is not recommended to drive the vehicle with the U0147 code present, as it can lead to further electrical issues and potential safety hazards due to the loss of communication between control modules.

6. How can I repair the U0147 code?

- Repairing the U0147 code may involve replacing the Gateway Module 'B', repairing damaged wiring or connectors, ensuring proper battery voltage, and performing software updates on the vehicle's control modules.

7. Is the U0147 code a common issue in certain vehicle makes or models?

- The U0147 code can occur in various vehicle makes and models, particularly those equipped with complex electronic systems and multiple control modules.

8. Can a DIY enthusiast fix the U0147 code at home?

- While basic troubleshooting such as checking connections and fuses can be done at home, diagnosing and repairing the U0147 code often requires specialized tools and expertise, making it more suitable for professional mechanics.

9. How much does it typically cost to repair the U0147 code?

- Repair costs for the U0147 code can vary depending on the underlying cause, but they may range from a few hundred to over a thousand dollars, including parts and labor.

10. How can I prevent the U0147 code from recurring in the future?

- To prevent the U0147 code from recurring, it's important to address any underlying issues promptly, perform regular maintenance on the vehicle's electrical system, and avoid overloading the communication network with aftermarket accessories.