AutoCodes – Ford – U0100 Ford

U0100 Ford Code - Lost Communication With Powertrain Control Module

Quick Answer

The Powertrain Control Module (PCM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). Common causes include Faulty Powertrain Control Module (PCM), PCM harness is open or shorted, PCM 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: U0100 Ford indicates Lost Communication With Powertrain Control Module.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), PCM harness is open or shorted, PCM 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 28,199

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0100 Ford Description

The Powertrain Control Module (PCM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). The U0100 code sets in continuous memory if data messages received from the PCM over the High Speed Controller Area Network (HS-CAN) are missing for greater than 5 seconds.

OBDII Code U0100 Ford - Lost Communication With Powertrain Control Module - AutoCodes.com — U0100 Ford Code - Lost Communication With Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC U0100 Ford?

Faulty Powertrain Control Module (PCM)
PCM harness is open or shorted
PCM circuit poor electrical connection

How to Fix the DTC U0100 Ford?

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 U0100 Ford 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 U0100 Ford code?

Need more information on how to fix the U0100 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0100 Ford 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 U0100 Ford Code

1. What does the OBDII code U0100 for Ford mean?

The U0100 code indicates a communication problem between the vehicle's PCM (Powertrain Control Module) and other control modules.

2. What are common symptoms of the U0100 code in a Ford vehicle?

Common symptoms include dashboard warning lights, drivability issues such as engine stalling or rough idling, and problems with transmission shifting.

3. What are possible causes of the U0100 code in a Ford vehicle?

Potential causes of the U0100 code include damaged wiring or connectors, a faulty PCM, issues with the CAN bus communication system, or a drained battery.

4. How can I diagnose the U0100 code in my Ford vehicle?

Diagnosing the U0100 code typically involves using a scan tool to read the code, checking for other related codes, inspecting wiring and connectors for damage, and testing the PCM and other control modules.

5. Can I still drive my Ford vehicle with the U0100 code present?

It is not recommended to drive your vehicle with the U0100 code present, as it can lead to further damage and safety risks. It's best to address the issue promptly.

6. How can I repair the U0100 code in my Ford vehicle?

Repairing the U0100 code may involve fixing any damaged wiring or connectors, replacing the PCM if necessary, and ensuring proper communication between control modules.

7. Are there any DIY tips for fixing the U0100 code in a Ford vehicle?

While some basic checks like inspecting wiring and connectors can be done DIY, diagnosing and repairing the U0100 code often requires advanced tools and expertise, so it's recommended to consult a professional mechanic.

8. How much does it typically cost to repair the U0100 code in a Ford vehicle?

The cost of repairing the U0100 code can vary depending on the underlying issue, the extent of the damage, and labor rates. It's advisable to get a few quotes from reputable mechanics for an accurate estimate.

9. Can the U0100 code be a recurring issue in Ford vehicles?

If the root cause of the U0100 code is not properly addressed, it can potentially recur. Proper diagnosis and repair are crucial to prevent the code from coming back.

10. Is resetting the PCM a viable solution for the U0100 code in a Ford vehicle?

While resetting the PCM may temporarily clear the code, it is not a permanent solution if the underlying issue is not fixed. It's important to address the root cause of the communication problem for a lasting repair.

1. What are common symptoms of the OBDII code U0100 in a Ford vehicle?

- Common symptoms include the check engine light turning on, loss of communication with the powertrain control module (PCM), and potential issues with engine performance or transmission shifting.

2. What are some possible causes of the U0100 code in a Ford vehicle?

- Possible causes include damaged wiring or connectors, a faulty PCM, a drained battery, software issues, or a malfunctioning communication module.

3. How can I diagnose the U0100 code in my Ford vehicle?

- Diagnosing the U0100 code may require using a diagnostic scanner to retrieve the trouble codes, checking the wiring and connectors for any damage, and performing a thorough inspection of the PCM and related components.

4. Can I still drive my Ford vehicle with the U0100 code present?

- It is not recommended to drive your Ford vehicle with the U0100 code present, as it may lead to potential safety hazards or further damage to the vehicle's systems.

5. How do I repair the U0100 code in my Ford vehicle?

- Repairing the U0100 code may involve fixing any damaged wiring or connectors, replacing the PCM if necessary, ensuring the battery is charged, and updating software as needed.

6. Is the U0100 code a serious issue in a Ford vehicle?

- The U0100 code should be addressed promptly to prevent further damage or safety risks. Ignoring the code may lead to performance issues or potential failures in the vehicle's systems.

7. Can a DIY enthusiast fix the U0100 code in a Ford vehicle?

- Depending on the cause of the U0100 code, some DIY enthusiasts may be able to address the issue by checking and repairing wiring or connectors. However, complex repairs involving the PCM may require professional assistance.