AutoCodes – Lincoln – U0100 Lincoln

U0100 Lincoln 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 Lincoln 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 5,154

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

What does this mean?

What are the Possible Causes of the DTC U0100 Lincoln?

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

How to Fix the DTC U0100 Lincoln?

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 Lincoln 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 Lincoln code?

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

Need Help with the Code?

Get the U0100 Lincoln 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 Lincoln Code

1. What does the OBDII code U0100 for a Lincoln mean?

The code U0100 indicates a communication problem between the vehicle's onboard computer system and the Powertrain Control Module (PCM).

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

Common symptoms of the U0100 code in a Lincoln may include engine stalling, rough idling, decreased fuel efficiency, and the vehicle going into limp mode.

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

Possible causes of the U0100 code in a Lincoln include a faulty PCM, damaged wiring or connectors, a weak battery, a software issue, or a communication network failure.

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

Diagnosing the U0100 code in a Lincoln typically involves using an OBDII scanner to read the code, checking the wiring and connectors for any visible damage, testing the battery voltage, and inspecting the PCM for any signs of malfunction.

5. Can I drive my Lincoln with the U0100 code?

It is not recommended to drive your Lincoln with the U0100 code present, as it can lead to further damage to the vehicle and compromise its performance and safety.

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

Repairing the U0100 code in a Lincoln may involve repairing or replacing damaged wiring or connectors, resetting the PCM, updating the software, or replacing the PCM if it is found to be faulty.

7. Will resetting the code make it go away permanently?

Resetting the U0100 code in a Lincoln may clear the code temporarily, but it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIYer fix the U0100 code in a Lincoln?

While some basic diagnostic steps can be performed by a DIYer, repairing the U0100 code in a Lincoln may require professional expertise and specialized tools to accurately diagnose and fix the issue.

9. How much does it cost to repair the U0100 code in a Lincoln?

The cost of repairing the U0100 code in a Lincoln can vary depending on the underlying cause of the issue, parts needed for repair, and labor costs. It is recommended to get a professional diagnosis for an accurate estimate.

10. How long does it take to repair the U0100 code in a Lincoln?

The time it takes to repair the U0100 code in a Lincoln can vary depending on the complexity of the issue and the availability of parts. It is advisable to consult with a mechanic for a more precise timeline based on your specific situation.