AutoCodes – Lincoln – U012D Lincoln

U012D Lincoln Code - Lost Communication With Generator 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 Generator Control Module, Generator Control Module harness is open or shorted, Generator 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: U012D Lincoln indicates Lost Communication With Generator Control Module.
Common causes: Common causes include Faulty Generator Control Module, Generator Control Module harness is open or shorted, Generator 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 624

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 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U012D Lincoln 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 Generator Control Module has not been received.

OBDII Code U012D Lincoln - Lost Communication With Generator Control Module - AutoCodes.com — U012D Lincoln Code - Lost Communication With Generator Control Module

What does this mean?

What are the Possible Causes of the DTC U012D Lincoln?

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

How to Fix the DTC U012D 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 U012D 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.

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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 U012D Lincoln Code

1. What are the common symptoms of OBDII code U012D in a Lincoln indicating lost communication with the Generator Control Module?

- Common symptoms include issues with the vehicle's electrical system, such as dimming or flickering lights, battery draining quickly, and potential charging system malfunctions.

2. What are some possible causes of the U012D code in a Lincoln?

- The U012D code can be triggered by a faulty Generator Control Module, damaged wiring or connectors related to the module, a drained or weak battery, or issues with the vehicle's communication network.

3. How can I diagnose the U012D code in my Lincoln?

- To diagnose the U012D code, a professional diagnostic scan tool capable of reading manufacturer-specific codes may be needed to pinpoint the exact cause of the communication loss with the Generator Control Module.

4. What steps can I take to repair the U012D code in my Lincoln?

- Repair options may include checking and repairing any damaged wiring or connectors, replacing the Generator Control Module if it is faulty, ensuring the battery is in good condition, and resetting the fault codes after repairs are completed.

5. Can I drive my Lincoln with the U012D code present?

- It is generally not recommended to drive the vehicle with the U012D code present, as it can lead to potential electrical system failures or the risk of the battery not charging properly. It is best to address the issue promptly.

6. How much does it typically cost to repair the U012D code in a Lincoln?

- The cost of repairing the U012D code can vary depending on the underlying cause of the communication loss with the Generator Control Module. Costs may include parts, labor, and diagnostic fees.

7. Are there any preventive measures to avoid encountering the U012D code in the future?

- Regular maintenance of the vehicle's electrical system, including checking the battery's health and ensuring proper wiring connections, can help prevent issues that may trigger the U012D code.

8. Can I reset the U012D code in my Lincoln without professional help?

- While it is possible to clear fault codes using an OBDII scanner, it is recommended to address the root cause of the U012D code before resetting it to prevent potential recurring issues.

9. Is the U012D code specific to Lincoln vehicles, or can it occur in other car makes?

- The U012D code indicating lost communication with the Generator Control Module can occur in various vehicle makes and models, not exclusive to Lincoln vehicles.

10. What should I do if the U012D code keeps coming back even after repairs?

- If the U012D code persists after repairs have been made, it may indicate an ongoing issue that requires further diagnosis by a professional technician specializing in automotive electrical systems.