AutoCodes – Generic – U0119

U0119 Code - Lost Communication With Fuel Cell Control Module

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 Fuel Cell Control Module, Fuel Cell Control Module harness is open or shorted, Fuel Cell Control 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: U0119 indicates Lost Communication With Fuel Cell Control Module.
Common causes: Common causes include Faulty Fuel Cell Control Module, Fuel Cell Control Module harness is open or shorted, Fuel Cell Control 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 3,230

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 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0119 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 Fuel Cell Control Module has not been received.

OBDII Code U0119 - Lost Communication With Fuel Cell Control Module - AutoCodes.com — U0119 Code - Lost Communication With Fuel Cell Control Module

What does this mean?

What are the Possible Causes of the DTC U0119?

Faulty Fuel Cell Control Module
Fuel Cell Control Module harness is open or shorted
Fuel Cell Control Module circuit poor electrical connection

How to Fix the DTC U0119?

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 U0119 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 U0119 code?

Need more information on how to fix the U0119 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0119 code diagnosed by a professional: Find a repair shop in your area

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 U0119 Code

1. What are the common symptoms of OBDII code U0119 (Lost Communication With Fuel Cell Control Module)?

- Common symptoms include issues with starting the vehicle, decreased engine performance, and illuminated dashboard warning lights.

2. What are the possible causes of OBDII code U0119?

- The code U0119 can be caused by a faulty fuel cell control module, damaged wiring or connectors, a weak or dead battery, or a communication network issue.

3. How can I diagnose the OBDII code U0119?

- Diagnosing the code U0119 usually involves using a diagnostic scanner to retrieve the trouble codes, checking the fuel cell control module and related components for any visible damage, and testing the communication network.

4. Can a DIYer repair OBDII code U0119 at home?

- Repairing the code U0119 may require advanced diagnostic tools and knowledge, so it is recommended to seek professional help. However, checking for loose connections or damaged wiring can be attempted by DIYers.

5. What are some tips for repairing OBDII code U0119?

- Tips for repairing the code U0119 include ensuring all connectors are properly connected, checking for any corrosion on electrical terminals, and following the manufacturer's diagnostic procedures.

6. Is it safe to continue driving with OBDII code U0119 present?

- It is not recommended to drive with the code U0119 present, as it can lead to further damage to the fuel cell control module and potentially affect the vehicle's performance and safety.

7. How much does it typically cost to repair OBDII code U0119?

- The cost of repairing the code U0119 can vary depending on the underlying cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

8. Can a bad fuel cell control module cause OBDII code U0119?

- Yes, a faulty fuel cell control module is one of the common causes of OBDII code U0119, as it can lead to a loss of communication between the module and other vehicle systems.

9. Will disconnecting the battery reset OBDII code U0119?

- Disconnecting the battery may temporarily clear the code U0119, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven and the system runs its diagnostic checks.

10. How long does it take to repair OBDII code U0119?

- The time required to repair the code U0119 can vary based on the cause of the issue and the availability of parts. In most cases, it may take a few hours to a day for professional technicians to diagnose and repair the problem.